Patent US3378293A successfully refreshed from Google Patents.
US3378293A
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Blocking element for sliding closure
Assignee: HERBERT L SILK
•
Filing: 1966-08-30
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Granted: 1968-04-16
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Expires: 1986-08-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Silk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:06
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0835; E05B65/0841; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10S292/47; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1063; Y10T292/1064; Y10T292/1072; Y10T292/1075; Y10T292/1083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US305681A
Cited
US407366A
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CA584396A
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US1607897A
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US1707867A
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US1740866A
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US2035666A
Cited
US2402939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |