US2665839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure booster regulator
Assignee: Ingersoll Rand Co
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Filing: 1949-09-14
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Granted: 1954-01-12
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Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Ostwald Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D23/00; G05D23/01; G05D23/13; G05D23/1386
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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |