Patent US2906501A successfully refreshed from Google Patents.
US2906501A
Expired / Lapsed
US
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Excavating apparatus
Assignee: Individual
•
Filing: 1957-09-24
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Granted: 1959-09-29
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Expires: 1977-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jules J Brell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:34
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/10; E02F9/00; E02F9/08; E02F9/085; E21; E21B; E21B7/00; E21B7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US564038A
Cited
CH40851A
Cited
US1050361A
Cited
DE502584C
Cited
US1975094A
Cited
GB415271A
Cited
US2200274A
Cited
US2382955A
Cited
US2486479A
Cited
US2577689A
Cited
US2746612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |