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Nanostone Water, Inc.

WALTHAM, MA · Clean tech · Acquired

Ceramic membrane filtration system for water treatment

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Updated · nanostone.com

Sector
Clean tech
Headquarters
WALTHAM, MA
Latest Form D
$49K, Feb 2021
Total capital
$49K
Federal grants
None on recordNo awards found in SBIR/STTR, NIH, NSF or DoD records.
Private capital raised
$49K
1 Form D · last Feb 2021
69 months since last filing
Federal contracts
None on recordNo federal contract awards found.
Granted patents
4
28 pending · first 2019
Rank in peer group#13 of 90

Capital timeline

2021FEDERAL ↑EQUITY ↓Cumulative $49K1st Form D$49K
2021FEDERAL ↑EQUITY ↓Cumulative $49K1st Form D$49K

Latest events

  • Private capital raisedForm D · SEC · 1st filing$49K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 90 peers

Line = median

Clean tech · Device

  • Granted patents#13 · top 14%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

From SEC Form D filings
  • Alan E HendersonDirectorNamed in SEC Form D filings
  • Eugene B SkayneExecutive OfficerNamed in SEC Form D filings
  • John E RitterExecutive OfficerNamed in SEC Form D filings
  • Macy B StonebackExecutive OfficerNamed in SEC Form D filings
  • Matthew S AhearnDirectorNamed in SEC Form D filings
  • Michael J AhearnExecutive Officer, DirectorNamed in SEC Form D filings
Show all 7 people
  • Steven D KloosDirectorNamed in SEC Form D filings

What it has protected

USPTO · 4 granted of 32
Show all 32 patent records
  • Ceramic Membrane Filtration Assembly with Sealing Device and Related MethodsFeb 10, 2026 · US 12,544,719Granted
  • Ceramic Membrane Filtration Assembly with Multi Port Endcap and Related MethodsJun 20, 2024 · Application 18582146Pending
  • Ceramic Membrane Filtration Assembly with Multi Port Endcap and Related MethodsMar 26, 2024 · US 11,938,449Granted
  • Membrane Modules With Limited Defects And Related MethodsNov 12, 2020 · Application 16959229Pending
  • Ceramic Membrane Module with Drive Plate and Related MethodsAug 18, 2020 · US 10,744,464Granted
  • Filter DeviceOct 1, 2019 · US 10,427,105Granted
  • Ceramic Membrane Module with Inflatable Assembly and Related MethodsFeb 21, 2019 · Application 16165944Pending
  • Ceramic Membrane System For Silica Removal And Related MethodsOct 25, 2018 · Application 15738044Pending
  • System For Operating A Ceramic Membrane And Related MethodsOct 25, 2018 · Application 15738046Pending
  • Fixture Device For Membrane Assembly And Related MethodsJun 7, 2018 · Application 15540951Pending
  • Membrane Assembly With End Cap Device And Related MethodsJan 25, 2018 · Application 15540957Pending
  • Ceramic Membrane Module With Drive Plate And Related MethodsApplication PCTUS2017028947Pending
  • Backwashing Ceramic MembranesApplication PCTUS2019055560Pending
  • Ceramic Membrane Module With Recessed Membrane And Related MethodsApplication PCTUS2016046408Pending
  • Ceramic Membrane Filtration Assembly With Multi Port Endcap And Related MethodsApplication 62365220Pending
  • Ceramic Membrane Filtration Assembly With Sealing Device And Related MethodsApplication 62365221Pending
  • Ceramic Membrane System For Silica Removal And Related MethodsApplication PCTUS2016038201Pending
  • System For Operating A Ceramic Membrane And Related MethodsApplication PCTUS2016038204Pending
  • Ceramic Membrane Module With Drive Plate And Related MethodsApplication 62326430Pending
  • Ceramic Membrane Module With Inflatable Assembly And Related MethodsApplication 62326444Pending
  • Fixture Device For Membrane Assembly And Related MethodsApplication PCTUS2016012365Pending
  • Membrane Assembly With End Cap Device And Related MethodsApplication PCTUS2016012366Pending
  • Tower Filtration Module Assembly And Related MethodsApplication PCTUS2015050238Pending
  • Ceramic Membrane Module With Recessed Membrane And Related MethodsApplication 62203253Pending
  • Ceramic Membrane System For Silica Removal And Related MethodsApplication 62182285Pending
  • System For Operating A Ceramic Membrane And Related MethodsApplication 62182244Pending
  • Fixture Device For Membrane Assembly And Related MethodsApplication 62100400Pending
  • Membrane Assembly With End Cap And Related MethodsApplication 62100407Pending
  • Backwashing Ceramic MembranesApplication 62745888Pending
  • Ceramic Membrane Filtration Assembly With Multi Port Endcap And Related MethodsApplication PCTUS2017043385Pending
  • Ceramic Membrane Filtration Assembly With Sealing Device And Related MethodsApplication PCTUS2017043386Pending
  • Ceramic Membrane Module With Inflatable Assembly And Related MethodsApplication PCTUS2017028949Pending

Related companies, and why

Regulatory activity · Clean tech

Sector-level, not company-level

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through . SBIR and STTR awards through .