US2429686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating parallelogram cutting machine
Assignee: Airco Inc
•
Filing: 1945-01-15
•
Granted: 1947-10-28
•
Expires: 1965-01-15
Abstract
No abstract record available.
Inventors
- 👤 Richard F Helmkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1172933A
Cited
US1542887A
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US1841878A
Cited
US1807989A
Cited
US1901254A
Cited
GB474033A
Cited
US2085112A
Cited
US2223452A
Cited
US2263036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |