US2883744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cold working a tubular structure
Assignee: Individual
•
Filing: 1954-10-18
•
Granted: 1959-04-28
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 George E Barnhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/02; C21D7/10; C21D7/12; B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0807; B21C37/0811; B21C37/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934; Y10T29/49938
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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |