US2801441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for producing internally threaded tubing
Assignee: Individual
•
Filing: 1955-03-10
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Granted: 1957-08-06
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Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Howard M Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:02
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/12; B29C48/13; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29D1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |