US2614733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper door unit and material spreader assembly for airplanes
Assignee: Individual
•
Filing: 1947-05-05
•
Granted: 1952-10-21
•
Expires: 1967-05-05
Abstract
No abstract record available.
Inventors
- 👤 William H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:38
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US339454A
Cited
US352158A
Cited
US441810A
Cited
US568776A
Cited
US177211A
Cited
US657957A
Cited
US941442A
Cited
US1384175A
Cited
US1691205A
Cited
US1618443A
Cited
US1921062A
Cited
FR817473A
Cited
US2069350A
Cited
US2177313A
Cited
US2337817A
Cited
US2334376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |