US2674218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hatchway and cover
Assignee: Individual
•
Filing: 1949-11-28
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Granted: 1954-04-06
•
Expires: 1969-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr David B Bannerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |