US2436374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined hatch cover lock and headrest
Assignee: Individual
•
Filing: 1945-05-15
•
Granted: 1948-02-24
•
Expires: 1965-05-15
Abstract
No abstract record available.
Inventors
- 👤 Robert E Birdsall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:20
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/22; F41H5/223; F41H5/26; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/087; Y10T292/0871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE517624C
Cited
US783338A
Cited
US1331874A
Cited
US1350713A
Cited
US1371422A
Cited
US1696439A
Cited
GB481883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |