US3471943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Training devices
Assignee: TPI Ltd
•
Filing: 1968-11-13
•
Granted: 1969-10-14
•
Expires: 1988-11-13
Abstract
No abstract record available.
Inventors
- 👤 Rogor Strange Waddington
- 👤 Bruce Duval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:41
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/06; G09B9/066; A; A63; A63B; A63B69/00; A63B69/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1613941A
Cited
US2208083A
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US2293612A
Cited
US2519233A
Cited
US2695145A
Cited
US2782560A
Cited
US2855702A
Cited
US3305943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |