US2425365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalanced door structure
Assignee: AVIATION CORP
•
Filing: 1945-11-13
•
Granted: 1947-08-12
•
Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 Herman A Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:28
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/02; F24C15/023; C; C10; C10B; C10B7/00; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1041; E05F1/1066; E05F1/12; E05F1/1246; E05F1/1269; E05Y; E05Y2900/00; E05Y2900/30; E05Y2900/308
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1530007A
Cited
US1862767A
Cited
US1767049A
Cited
US2264059A
Cited
US2234259A
Cited
US2313582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |