US2651223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting metals
Assignee: Heald Machine Co
•
Filing: 1950-01-13
•
Granted: 1953-09-08
•
Expires: 1970-01-13
Abstract
No abstract record available.
Inventors
- 👤 Robert S Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:57
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/10; B23B27/12; Y; Y10; Y10T; Y10T407/00; Y10T407/12; Y10T407/22; Y10T407/2222; Y10T407/2238; Y10T407/224; Y10T408/00; Y10T408/89
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US543551A
Cited
US952158A
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US2127523A
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US2233724A
Cited
GB618696A
Cited
US2551167A
Cited
US2359954A
Cited
GB603968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |