US3283978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for fracturing pipe
Assignee: Individual
•
Filing: 1964-08-26
•
Granted: 1966-11-08
•
Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Sanford E Coblitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:55
CPC Classifications
B; B23; B23D; B23D21/00; B23D21/06; B23D21/08; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US598159A
Cited
US1082209A
Cited
US2126843A
Cited
US2219455A
Cited
US2673632A
Cited
US2949669A
Cited
US2950035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |