US3635756A
Expired / Lapsed
US
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Nonfogging transparent material
Assignee: National Patent Development Corp
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Filing: 1969-07-28
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Granted: 1972-01-18
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Expires: 1989-07-28
Abstract
Abstract A transparent nonfogging coating is applied to a normally fogging transparent or reflecting substrate. The nonfogging coating preferably comprises a hydrophilic acrylate or methacrylate polymer. The polymer can be modified by copolymerization with a monobasic or polybasic unsaturated carboxylic acid or partial ester thereof. The polymer can be cross-linked with a polyepoxide to increase its hardness. Typical substrates include automobile, train and airplane windows, sunglasses, camera lens, microscope lens, binocular lens, telescope lens, meat wrappers, diving masks, ski glasses, mirrors.
Inventors
- 👤 Thomas H Shepherd
- 👤 Francis E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; A23; A23L; A23L27/00; A23L27/70; A23L27/74; B; B29; B29D; B29D11/00; B29D11/00865; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C09D; C09D133/00; C09D133/04; C09D133/14; C09D4/00; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31551; Y10T428/31623; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
A combination according to claim 1 wherein the window is a windshield.
Claim 2
Dependent Claim
28 words
A combination according to claim 1 wherein the polymer coating is selected from the group consisting of polymers of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate.
Claim 3
Dependent Claim
13 words
A combination according to claim 3 wherein the windoW is a glass window.
Claim 4
Dependent Claim
18 words
A combination according to claim 1 wherein the polymer includes 0.25 to 20 percent of a cross-linking agent.
Claim 5
Dependent Claim
13 words
A combination according to claim 5 wherein the window is a glass windshield.
References Cited (Backward Citations)
GB848873A
Cited
US3079434A
Cited
US3267174A
Cited
US3414635A
Cited
US3459698A
Cited
US3464938A
Cited
US3488215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |