Patent US3275346A successfully refreshed from Google Patents.
US3275346A
Expired / Lapsed
US
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Flange
Assignee: Walker Manufacturing Co
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Filing: 1964-06-08
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Granted: 1966-09-27
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Expires: 1984-06-08
Abstract
No abstract record available.
Inventors
- 👤 Paul V Gregg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:48
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F16; F16L; F16L23/00; F16L23/02; F16L23/032
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |