Patent US3531963A successfully refreshed from Google Patents.
US3531963A
Expired / Lapsed
US
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Bending apparatus
Assignee: Combustion Engineering Inc
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Filing: 1967-12-04
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Granted: 1970-10-06
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Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Kenneth B Garner
- 👤 Kenneth A Simons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:23
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/02; B21D7/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US361398A
Cited
CA642905A
Cited
FR618737A
Cited
US2349525A
Cited
FR1020508A
Cited
US2871909A
Cited
US3190105A
Cited
US3276235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |