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US3444867A
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Assignee: CHARLES R THORNTON
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Filing: 1967-09-11
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Granted: 1969-05-20
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Expires: 1987-09-11
Abstract
No abstract record available.
Inventors
- 👤 Charles R Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:53
CPC Classifications
B; B60; B60S; B60S3/00; B60S3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1136763A
Cited
US2289238A
Cited
US2997048A
Cited
US3096775A
Cited
US3277907A
Cited
US3258019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |