US2433966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tubular members by progressive helical welding
Assignee: Individual
•
Filing: 1943-12-16
•
Granted: 1948-01-06
•
Expires: 1963-12-16
Abstract
No abstract record available.
Inventors
- 👤 Marie S Van Keuren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:43
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12292; Y10T428/12333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US13984A
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US412363A
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US417800A
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US2025741A
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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) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |