US2990109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double acting rotary compressor
Assignee: Ingersoll Rand Co
•
Filing: 1959-01-21
•
Granted: 1961-06-27
•
Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Grover D Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:14
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C18/00; F04C18/30; F04C18/34; F04C18/344; F04C18/3446
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US232901A
Cited
DE362768C
Cited
US1283089A
Cited
US1923561A
Cited
US2368572A
Cited
US2476397A
Cited
US2521592A
Cited
US2521595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |