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US3537198A
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Assignee: DON C BARRETT
•
Filing: 1966-01-05
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Granted: 1970-11-03
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Expires: 1986-01-05
Abstract
No abstract record available.
Inventors
- 👤 Don C Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:39
CPC Classifications
G; G09; G09F; G09F11/00; G09F11/02; Y; Y10; Y10T; Y10T74/00; Y10T74/14; Y10T74/1418; Y10T74/1424; Y10T74/1441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |