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Patent US3462176A successfully refreshed from Google Patents.
US3462176A
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Rotatable coupling with passages
Assignee: Ethyl Corp
•
Filing: 1967-02-27
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Granted: 1969-08-19
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Richard W Goodrum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:34
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0824; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/25; B29C48/30; B29C48/32; B29C48/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1324967A
Cited
US1883509A
Cited
US2322679A
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US2412287A
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US2429929A
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US2701146A
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US2820650A
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GB759098A
Cited
US3020588A
Cited
GB859491A
Cited
US3351360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |