US3747530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window protector
Assignee: United States Department of the Navy
•
Filing: 1966-10-26
•
Granted: 1973-07-24
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Expires: 1986-10-26
Abstract
Abstract A protector for an optical fuze window formed of a thin polyester film spatially displaced in front of the window and having a thin film of meltable wax deposited thereon.
Inventors
- 👤 C Tepper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:49
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
The protector of claim 1 wherein said film of thermal material is spaced from said window so as to form a pocket of air therebetween.
Claim 2
Dependent Claim
19 words
The protector of claim 2 in which said film of thermal insulating material is a formed from a polyester.
Claim 3
Dependent Claim
14 words
The protector of claim 3 wherein said coating is a thin film of wax.
Claim 4
Dependent Claim
17 words
The protector of claim 1 in which said film of thermal insulating material is convex in shape.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |