US2218183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door locking mechanism
Assignee: Individual
•
Filing: 1938-02-14
•
Granted: 1940-10-15
•
Expires: 1958-02-14
Abstract
No abstract record available.
Inventors
- 👤 Ray W Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:51
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/24; E05B63/244; Y; Y10; Y10S; Y10S292/00; Y10S292/27; Y10S292/31; Y10S292/37; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1062; Y10T292/68; Y10T292/696; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5496
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) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |