US2508218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary door lock
Assignee: C M BRAZELTON
•
Filing: 1947-05-15
•
Granted: 1950-05-16
•
Expires: 1967-05-15
Abstract
No abstract record available.
Inventors
- 👤 William H Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:14
CPC Classifications
E; E05; E05B; E05B77/00; E05B77/52; Y; Y10; Y10S; Y10S292/00; Y10S292/65; Y10T; Y10T292/00; Y10T292/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2311132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |