US3093300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial flow compressor
Assignee: Ingersoll Rand Co
•
Filing: 1961-01-31
•
Granted: 1963-06-11
•
Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 Grover D Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:03
CPC Classifications
F; F04; F04C; F04C23/00; F04C23/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PLURAL STAGE AXIAL FLOW GAS HANDLING MACHINE COMPRISING: A CASING CONTAINING A PAIR OF GAS HANDLING EXPANSIBLE-CONTRACTABLE POSITIVE DISPLACEMENT STAGES INCLUDING FIRST AND SECOND STAGES; EACH STAGE INCLUDING A PAIR OF INTER-MESHING SCREW-TYPE ROTORS COOPERATING WITH EACH OTHER TO FORM AN EXPANSIBLE-CONTRACTABLE POSITIVE DISPLACEMENT CHAMBER THEREBETWEEN AND MOUNTED IN AXIALLY SPACED RELATIONSHIP TO THE ROTORS OF THE OTHER STAGE; A PARTITION SECURED TO THE CASING AND LOCATED BETWEEN THE ROTORS OF SAID FIRST AND SECOND STAGES; SAID PARTITION BEING HOLLOW AND INCLUDING A PAIR OF AXIALLY SPACED WALLS, EACH OF WHICH IS LOCATED ADJACENT ONE OF SAID STAGES AND ENGAGES THE END FACES OF THE ROTORS OF THAT STAGE TO CO-
Claim 2
Dependent Claim
112 words
A PLURAL STAGE AXIAL FLOW GAS HANDLING MACHINE COMPRISING: A CASING CONTAINING A PAIR OF GAS HANDLING EXPANSIBLE-CONTRACTABLE POSITIVE DISPLACEMENT STAGES INCLUDING FIRST AND SECOND STAGES; EACH STAGE INCLUDING A PAIR OF INTER-MESHING SCREW-TYPE ROTORS COOPERATING WITH EACH OTHER TO FORM AN EXPANSIBLE-CONTRACTABLE POSITIVE DISPLACEMENT CHAMBER THEREBETWEEN AND MOUNTED IN AXIALLY SPACED RELATIONSHIP TO THE ROTORS OF THE OTHER STAGE; A PARTITION SECURED TO THE CASING AND LOCATED BETWEEN THE ROTORS OF SAID FIRST AND SECOND STAGES; SAID PARTITION BEING HOLLOW AND INCLUDING A PAIR OF AXIALLY SPACED WALLS, EACH OF WHICH IS LOCATED ADJACENT ONE OF SAID STAGES AND ENGAGES THE END FACES OF THE ROTORS OF THAT STAGE TO CO-
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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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |