US3383743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe bending apparatus and method
Assignee: United States Concrete Pipe Co
•
Filing: 1965-10-13
•
Granted: 1968-05-21
•
Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Cotton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:52
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/08; B29C53/083; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21D; B21D7/00; B21D7/02; B21D7/024; B21D7/025; B29L; B29L2023/00; B29L2023/22; Y; Y10; Y10S; Y10S425/00; Y10S425/218
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US975062A
Cited
US1558030A
Cited
US2502247A
Cited
US2508293A
Cited
US2649642A
Cited
US2751658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |