US2454920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock construction
Assignee: KEIL LOCK CO Inc
•
Filing: 1945-02-02
•
Granted: 1948-11-30
•
Expires: 1965-02-02
Abstract
No abstract record available.
Inventors
- 👤 Emil J Heineman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:56
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/18; Y; Y10; Y10S; Y10S70/00; Y10S70/06; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/0982; Y10T292/0983; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US720986A
Cited
US741685A
Cited
US1559037A
Cited
US1758263A
Cited
GB383565A
Cited
GB463605A
Cited
US2225545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |