Patent US3434674A successfully refreshed from Google Patents.
US3434674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storable tubular extensible member device
Assignee: De Havilland Aircraft of Canada Ltd
•
Filing: 1967-05-01
•
Granted: 1969-03-25
•
Expires: 1987-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ernest Groskopfs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:17
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/06; F16H19/064; B; B64; B64G; B64G1/00; B64G1/22; B64G1/222; B64G1/2221; B64G1/2225; B64G1/2229; B64G99/00; H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/085; H01Q1/087; B64G1/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1398721A
Cited
US1947392A
Cited
US2264514A
Cited
US2197675A
Cited
US2835455A
Cited
US3144104A
Cited
US3357457A
Cited
US3371453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |