Patent US2495533A successfully refreshed from Google Patents.
US2495533A
Expired / Lapsed
US
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Method and apparatus for corrugating metal tubing
Assignee: Individual
•
Filing: 1946-08-17
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Granted: 1950-01-24
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Expires: 1966-08-17
Abstract
No abstract record available.
Inventors
- 👤 Justin W Macklin
- 👤 William H Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:02
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711075A
Cited
US1968124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |