US2675172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloader for compressors
Assignee: Ingersoll Rand Co
•
Filing: 1946-03-22
•
Granted: 1954-04-13
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 James H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:15
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US831522A
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US1150915A
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US1621913A
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US1614143A
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US1614138A
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US1607531A
Cited
US1918891A
Cited
US1969076A
Cited
US2032429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |