US3431677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sash release mechanism
Assignee: AWL Ltd A DE CORP
•
Filing: 1967-10-12
•
Granted: 1969-03-11
•
Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Yale W Ehret
- 👤 Harry Zoltok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/02; B61D19/023; B60; B60J; B60J9/00; B60J9/02; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US198553A
Cited
US279791A
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US546102A
Cited
US807779A
Cited
US832420A
Cited
US1122199A
Cited
US2454794A
Cited
US2830843A
Cited
US2724257A
Cited
CH358002A
Cited
US3101603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |