Patent US101113A successfully refreshed from Google Patents.
Patent US2586601A successfully refreshed from Google Patents.
US2586601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway hatch cover and locking means therefor
Assignee: Youngstown Steel Door Co
•
Filing: 1946-09-20
•
Granted: 1952-02-19
•
Expires: 1966-09-20
Abstract
No abstract record available.
Inventors
- 👤 Wilfred A Beauchamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:24
CPC Classifications
B; B61; B61D; B61D7/00; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/202
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1751720A
Cited
US2015767A
Cited
US2140570A
Cited
US2316661A
Cited
US2372394A
Cited
US2372369A
Cited
US2405040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |