US2187439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane equipment for the recovery of seaplanes and boats
Assignee: THEMSELVES AND CLARKE CHAPMAN
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Filing: 1939-01-14
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Granted: 1940-01-16
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Expires: 1959-01-14
Abstract
No abstract record available.
Inventors
- 👤 Wcodeson William Armstrong
- 👤 Midgley Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:36
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/40; B66D1/48; B66D2700/00; B66D2700/01; B66D2700/0108; Y; Y10; Y10S; Y10S254/00; Y10S254/90; Y10S414/00; Y10S414/126; Y10T; Y10T74/00; Y10T74/21; Y10T74/2133; Y10T74/2135
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) | 1943-01-15 | 1943-07-17 | 1944-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-01-15 | 1947-07-17 | 1948-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-01-15 | 1951-07-17 | 1952-01-16 | $7700.00 | Window Closed / Lapsed |