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Patent US2879036A successfully refreshed from Google Patents.
US2879036A
Expired / Lapsed
US
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Masonry drill
Assignee: Individual
•
Filing: 1956-06-25
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Granted: 1959-03-24
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Philip T Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:34
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; B; B23; B23B; B23B51/00; B23B51/0002; B23B51/009; E21B10/62; B23B2251/00; B23B2251/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2504978A
Cited
US2666622A
Cited
US2498251A
Cited
US2575239A
Cited
US2673714A
Cited
US2607562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |