US3397798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupler device
Assignee: W H MINER Inc
•
Filing: 1966-02-23
•
Granted: 1968-08-20
•
Expires: 1986-02-23
Abstract
No abstract record available.
Inventors
- 👤 Robert L Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/04; B61G9/08; B61G7/00; B61G7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US847941A
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US1925461A
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US3033384A
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US3178037A
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US3176856A
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US3176857A
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US3207270A
Cited
US3246771A
Cited
US3301410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |