US2420441A
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Assignee: Allis Chalmers Corp
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Filing: 1944-03-18
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Granted: 1947-05-13
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Expires: 1964-03-18
Abstract
No abstract record available.
Inventors
- 👤 Ira W Paterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:59
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/32; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/415; F15B2211/41527; F15B2211/42; F15B2211/421; F15B2211/424; F15B2211/428; F15B2211/455; F15B2211/46; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/71; F15B2211/7107; F15B2211/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |