Patent US3494575A successfully refreshed from Google Patents.
US3494575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground and air vehicles
Assignee: David Budworth Ltd
•
Filing: 1966-04-25
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Granted: 1970-02-10
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 David D Budworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:37
CPC Classifications
B; B64; B64C; B64C37/00
Claims Analysis
Total Claims: 0
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US3045953A
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US3095165A
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US3033492A
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US3084888A
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US3388878A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |