US2601983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latching and starting apparatus
Assignee: Individual
•
Filing: 1949-10-03
•
Granted: 1952-07-01
•
Expires: 1969-10-03
Abstract
No abstract record available.
Inventors
- 👤 Louis F Schoelkopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/02; E05F5/027; E05F15/00; E05F15/50; E05F15/53; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0876; Y10T292/0883; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1047; Y10T292/1075; Y10T292/1082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US652828A
Cited
US1269467A
Cited
US2190653A
Cited
US2129926A
Cited
US2304556A
Cited
US2343316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |