Patent US1484831A successfully refreshed from Google Patents.
US1484831A
Expired / Lapsed
US
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Drillproof cylinder lock
Assignee: Emhart Industries Inc
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Filing: 1923-03-19
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Granted: 1924-02-26
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Expires: 1943-03-19
Abstract
No abstract record available.
Inventors
- 👤 Norman B Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:41
CPC Classifications
E; E05; E05B; E05B15/00; E05B15/16; E05B15/1614; E05B2015/1628; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7921
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) | 1927-02-25 | 1927-08-27 | 1928-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-25 | 1931-08-27 | 1932-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-25 | 1935-08-27 | 1936-02-26 | $7700.00 | Window Closed / Lapsed |