US2927368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a tubular article having an abrupt change in direction
Assignee: BENT TUBE Inc
•
Filing: 1956-05-14
•
Granted: 1960-03-08
•
Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 Swan William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/04; B21D39/044; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49444
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE276537C
Cited
US63422A
Cited
US99459A
Cited
US142929A
Cited
US287494A
Cited
US534381A
Cited
US972119A
Cited
US1077741A
Cited
US1598893A
Cited
US1750010A
Cited
US1868696A
Cited
US1908373A
Cited
US1993361A
Cited
US2183271A
Cited
US2736949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |