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US2299181A
Expired / Lapsed
US
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Backset extension unit for door locks
Assignee: Schlage Lock Co LLC
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Filing: 1940-08-24
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Granted: 1942-10-20
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Expires: 1960-08-24
Abstract
No abstract record available.
Inventors
- 👤 Walter R Schlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:37
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/06; E05B55/00; E05B55/005; Y; Y10; Y10T; Y10T292/00; Y10T292/03; Y10T292/06; Y10T292/62
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) | 1945-10-19 | 1946-04-20 | 1946-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-19 | 1950-04-20 | 1950-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-19 | 1954-04-20 | 1954-10-20 | $7700.00 | Window Closed / Lapsed |