US2421639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for forming and reinforcing cutouts
Assignee: MUTHER
•
Filing: 1943-10-05
•
Granted: 1947-06-03
•
Expires: 1963-10-05
Abstract
No abstract record available.
Inventors
- 👤 Lorenz F Muther
- 👤 Frederick S Glines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
A; A41; A41H; A41H37/00; A41H37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319413A
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US1373462A
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US1600517A
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US1749856A
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US2114983A
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US2253051A
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US2182021A
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US2381818A
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US2360337A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |