US974886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency-exit-door lock.
Assignee: Caldwell Manufacturing Co Inc
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Filing: 1909-11-10
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Granted: 1910-11-08
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Expires: 1929-11-10
Abstract
No abstract record available.
Inventors
- 👤 Percy W Hodgkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/10; E05B65/1046; E05B65/106; E05B65/1073; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908; Y10T292/0909
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) | 1913-11-07 | 1914-05-09 | 1914-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-11-07 | 1918-05-09 | 1918-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-11-07 | 1922-05-09 | 1922-11-08 | $7700.00 | Window Closed / Lapsed |