Patent US2540172A successfully refreshed from Google Patents.
US2540172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination lock
Assignee: Individual
•
Filing: 1946-03-13
•
Granted: 1951-02-06
•
Expires: 1966-03-13
Abstract
No abstract record available.
Inventors
- 👤 Steave S Nieratka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:37
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/12; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5336; Y10T70/70; Y10T70/7153; Y10T70/7181; Y10T70/7198; Y10T70/7237; Y10T70/726
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US26569A
Cited
US530551A
Cited
USRE16833E
Cited
US648226A
Cited
US1032631A
Cited
US1062513A
Cited
US1189155A
Cited
US1218084A
Cited
US1566829A
Cited
US2319931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |