Patent US2707820A successfully refreshed from Google Patents.
US2707820A
Expired / Lapsed
US
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Method for making tubular elements
Assignee: Individual
•
Filing: 1950-10-11
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Granted: 1955-05-10
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Expires: 1970-10-11
Abstract
No abstract record available.
Inventors
- 👤 Julian L Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:15
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/14
Claims Analysis
Total Claims: 0
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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) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |