US1650607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for forming pipe skelp
Assignee: National Tube Co
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Filing: 1926-04-21
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Granted: 1927-11-29
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Expires: 1946-04-21
Abstract
No abstract record available.
Inventors
- 👤 Howard D Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
B; B21; B21D; B21D19/00; B21D19/005; B21B; B21B1/00; B21B1/22; B21B1/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1930-11-28 | 1931-05-30 | 1931-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-11-28 | 1935-05-30 | 1935-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-11-28 | 1939-05-30 | 1939-11-29 | $7700.00 | Window Closed / Lapsed |