Patent US2929914A successfully refreshed from Google Patents.
US2929914A
Expired / Lapsed
US
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Apparatus for fabricating tubular shells
Assignee: OLDBERG Manufacturing CO
•
Filing: 1957-06-06
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Granted: 1960-03-22
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Expires: 1977-06-06
Abstract
No abstract record available.
Inventors
- 👤 Walter J Ely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:23
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2357170A
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US2333997A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |