US3406449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal pipe cutter with screwthreaded adjustment means
Assignee: RALPH W DOERNER
•
Filing: 1967-07-31
•
Granted: 1968-10-22
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Doerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
B; B23; B23D; B23D21/00; B23D21/14; B23D21/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US764637A
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US872290A
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US936674A
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US1240779A
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US1457258A
Cited
US2572611A
Cited
US2728137A
Cited
US2802262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |