Patent US1696882A successfully refreshed from Google Patents.
Patent US934928A successfully refreshed from Google Patents.
US934928A
Expired / Lapsed
US
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Safety device for locks.
Assignee: OTTO S GROPPER
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Filing: 1909-05-21
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Granted: 1909-09-21
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Expires: 1929-05-21
Abstract
No abstract record available.
Inventors
- 👤 Friedrich Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:41
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/14; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7955; Y10T70/7977; Y10T70/7983
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) | 1912-09-20 | 1913-03-22 | 1913-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-09-20 | 1917-03-22 | 1917-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-09-20 | 1921-03-22 | 1921-09-21 | $7700.00 | Window Closed / Lapsed |