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US3002771A
Expired / Lapsed
US
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Coupling devices
Assignee: Individual
•
Filing: 1959-07-31
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Granted: 1961-10-03
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Expires: 1979-07-31
Abstract
No abstract record available.
Inventors
- 👤 Richard O Chakroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:45
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/113; F16L27/1136; F16L19/00; F16L19/02; F16L19/025; F16L19/028; F16L19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US233412A
Cited
US1367348A
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US1494693A
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US2040008A
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US2383679A
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US2502753A
Cited
US2520501A
Cited
US2918313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |