US3592669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water repellent composition for coated optical glass surfaces
Assignee: United States Department of the Navy
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Filing: 1968-04-23
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Granted: 1971-07-13
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Expires: 1988-04-23
Abstract
Abstract COMPOSITIONS WHICH ARE MIXTURES OF A HYDROCARBON WAX IN EQUAL TO MINOR PROPORTION BY WEIGHT WITH MIXED ISOMERS OF LONG CHAIN ALKYLAMINE SALTS OF LONG CHAIN ALKYL OR ALKENYLSUCCINIC ACID LONG CHAIN ALKYLMONOAMIDES. THE COMPOSITIONS ARE WATER REPELLENT AND MAY BE USED TO PROVIDE A TRANSPARENT WATER REPELLENT FILM ON OPTICAL GLASS SURFACES WHICH ARE COATED WITH AN ANTIREFLECTION COATING SUCH AS MAGNESIUM FLUORIDE.
Inventors
- 👤 Hayward R Baker
- 👤 Robert N Bolster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09D; C09D191/00; C09D191/06; C09D191/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |