Patent US5318814A successfully refreshed from Google Patents.
US5318814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting the settling of barnacles
Assignee: Aristech Acrylics LLC
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Filing: 1993-04-05
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Granted: 1994-06-07
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Expires: 2013-04-05
Abstract
Abstract Settlement of barnacles on surfaces in a marine environment is inhibited by employing as a construction material for said surface of polymers including methyl methacrylate and an effective amount (preferably about 2% to about 10%) of a copolymerizable N-substituted maleimide.
Inventors
- 👤 Sharon J. Elliott
- 👤 Virginia Piermattie
- 👤 Stanley A. Rice
- 👤 Theodore R. Wessendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:40
CPC Classifications
A; A01; A01N; A01N37/00; A01N37/18; A01N37/32; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
Method of inhibiting the settlement of barnacles on a marine surface or article exposed to settlement thereof comprising making such surface or article from a copolymer including as monomers methyl methacrylate and an effective amount of N-phenyl maleimide, and exposing said surface or article to settlement of barnacles.
Claim 2
Dependent Claim
48 words
Method of inhibiting the settlement of barnacles on a marine surface or article exposed to settlement thereof comprising making such surface or article from a copolymer including as monomers methyl methacrylate and an effective amount of N-phenyl maleimide, and exposing said surface or article to settlement of barnacles.
Claim 3
Dependent Claim
14 words
Method of claim 1 in which such surface or article is a boat hull.
Claim 4
Dependent Claim
13 words
Method of claim 1 in which such surface or article is a buoy.
Claim 5
Dependent Claim
13 words
Method of claim 1 in which such surface or article is a piling.
Claim 6
Dependent Claim
20 words
Method of claim 1 wherein the N-phenyl maleimide comprises about 1% to about 40% of the weight of said copolymer.
Claim 7
Dependent Claim
20 words
Method of claim 1 wherein the N-phenyl maleimide comprises about 2% to about 10% of the weight of said copolymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |