US2342579A
Expired / Lapsed
US
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Pressure regulating system
Assignee: Allis Chalmers Corp
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Filing: 1942-01-22
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Granted: 1944-02-22
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Expires: 1962-01-22
Abstract
No abstract record available.
Inventors
- 👤 John R Hagemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:07
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/20; F01D17/22; F01D17/26; G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; G05D16/187; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7793; Y10T137/7808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-02-21 | 1947-08-23 | 1948-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-21 | 1951-08-23 | 1952-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-21 | 1955-08-23 | 1956-02-22 | $7700.00 | Window Closed / Lapsed |