Patent US1688240A successfully refreshed from Google Patents.
US1688240A
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US
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Dead locking latch
Assignee: Individual
•
Filing: 1927-11-29
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Granted: 1928-10-16
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Expires: 1947-11-29
Abstract
No abstract record available.
Inventors
- 👤 Henry W Keigwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:29
CPC Classifications
E; E05; E05B; E05B13/00; E05B13/002; E05B13/004; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; E05B65/00; E05B65/0035; Y; Y10; Y10S; Y10S292/00; Y10S292/52; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/0982; Y10T292/0983; Y10T292/0984; Y10T292/93; Y10T292/96
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) | 1931-10-16 | 1932-04-16 | 1932-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-16 | 1936-04-16 | 1936-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-16 | 1940-04-16 | 1940-10-16 | $7700.00 | Window Closed / Lapsed |