US2959133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed pump motor unit
Assignee: Allis Chalmers Corp
•
Filing: 1957-09-23
•
Granted: 1960-11-08
•
Expires: 1977-09-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:02
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/06; F04D7/065; F04D29/00; F04D29/08; F04D29/10; F04D29/106; F04D29/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958065A
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US2747901A
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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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |