US3473680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: DAVID L DOWNER
•
Filing: 1967-10-11
•
Granted: 1969-10-21
•
Expires: 1987-10-11
Abstract
No abstract record available.
Inventors
- 👤 David L Downer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:13
CPC Classifications
B; B60; B60R; B60R11/00; B60R11/06; Y; Y10; Y10S; Y10S224/00; Y10S224/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309251A
Cited
US2577263A
Cited
US2573102A
Cited
US3209969A
Cited
US3261521A
Cited
US3318471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |