Patent US3456964A successfully refreshed from Google Patents.
US3456964A
Expired / Lapsed
US
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Low torque pipe swivel
Assignee: ZIERDEN Co
•
Filing: 1967-08-04
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Granted: 1969-07-22
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Expires: 1987-08-04
Abstract
No abstract record available.
Inventors
- 👤 Frank P Zierden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:44
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/02; F16L27/04; F16L27/06; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0824; F16L27/0828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1446006A
Cited
US1825774A
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US1915100A
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US2723136A
Cited
US2805086A
Cited
US2793058A
Cited
US3058761A
Cited
US3332709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |