US3026948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth boring apparatus
Assignee: Individual
•
Filing: 1959-09-08
•
Granted: 1962-03-27
•
Expires: 1979-09-08
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Pettee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:38
CPC Classifications
A; A01; A01C; A01C5/00; A01C5/04; E; E21; E21B; E21B7/00; E21B7/02; E21B7/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2067781A
Cited
US2414072A
Cited
US2410508A
Cited
US2635855A
Cited
US2806324A
Cited
US2918130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |