US2729485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door lock spring unit
Assignee: Schlage Lock Co LLC
•
Filing: 1951-08-20
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Granted: 1956-01-03
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Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Schlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:33
CPC Classifications
E; E05; E05B; E05B3/00; E05B3/06; E05B3/065; Y; Y10; Y10T; Y10T292/00; Y10T292/03; Y10T292/57; Y10T292/88; Y10T74/00; Y10T74/20; Y10T74/20006
Claims Analysis
Total Claims: 0
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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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |