US3483841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1967-11-24
•
Granted: 1969-12-16
•
Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Walter L Blackburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:13
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/04; B63B21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314658A
Cited
GB107636A
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US2193407A
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US2411626A
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US2573806A
Cited
US2722907A
Cited
US2798448A
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US2855162A
Cited
US3292567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |