US2424524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring machine
Assignee: Davis & Thompson Co
•
Filing: 1942-09-18
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Granted: 1947-07-22
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Expires: 1962-09-18
Abstract
No abstract record available.
Inventors
- 👤 William H Weimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:26
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/16; B23B31/16158; B23B29/00; B23B29/04; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; B23Q35/103; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17564; Y10T279/17572; Y10T279/17581; Y10T279/17589; Y10T82/00; Y10T82/13; Y10T82/135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US528381A
Cited
DE356083C
Cited
US1202139A
Cited
US1230034A
Cited
GB167401A
Cited
US1878175A
Cited
US2092101A
Cited
US2297106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |