US2902832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe driving tool attachments
Assignee: Delaware Tool Steel Corp
•
Filing: 1956-01-09
•
Granted: 1959-09-08
•
Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 William B Levy
- 👤 Carl L Roehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:45
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/10; E21; E21B; E21B7/00; E21B7/26; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1188485A
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US1130076A
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US1607725A
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US1444834A
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US1960888A
Cited
US2053508A
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US2102921A
Cited
US2229408A
Cited
CH228491A
Cited
US2583965A
Cited
US2802340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |