Patent US2232137A successfully refreshed from Google Patents.
US2232137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder lock
Assignee: Yale and Towne Manufacturing Co
•
Filing: 1937-07-01
•
Granted: 1941-02-18
•
Expires: 1957-07-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel F Rolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:32
CPC Classifications
E; E05; E05B; E05B27/00; E05B27/005; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7593; Y10T70/7599; Y10T70/7605; Y10T70/7667; Y10T70/7689; Y10T70/7701
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |