Patent US2998839A successfully refreshed from Google Patents.
US2998839A
Expired / Lapsed
US
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Flaring tool
Assignee: Ridge Tool Co
•
Filing: 1957-12-03
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Granted: 1961-09-05
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 Carl H Ingwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:22
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/02; B21D41/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1775766A
Cited
US1921810A
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US2004313A
Cited
US2124743A
Cited
US2280078A
Cited
US2737225A
Cited
US2711773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |