US1438730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door-locking mechanism
Assignee: Individual
•
Filing: 1922-01-30
•
Granted: 1922-12-12
•
Expires: 1942-01-30
Abstract
No abstract record available.
Inventors
- 👤 Charles I Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:20
CPC Classifications
E; E05; E05B; E05B83/00; E05B83/02; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863; Y10T292/0864; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1031; Y10T292/1043; Y10T292/1075; Y10T292/1083; Y10T292/1089; Y10T292/68; Y10T292/696; Y10T292/702
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) | 1925-12-11 | 1926-06-12 | 1926-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-11 | 1930-06-12 | 1930-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-11 | 1934-06-12 | 1934-12-12 | $7700.00 | Window Closed / Lapsed |