Patent US3237847A successfully refreshed from Google Patents.
US3237847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor and method
Assignee: Individual
•
Filing: 1961-07-03
•
Granted: 1966-03-01
•
Expires: 1981-07-03
Abstract
No abstract record available.
Inventors
- 👤 Wilson Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
F; F02; F02G; F02G3/00; F02G3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF COMPRESSING GAS COMPRISING, INTIALLY COMPRESSING THE GAS TO AN ELEVATED PRESSURE, FURTHER COMPRESSING THE INTIALLY-COMPRESSED GAS BY HEATING THE INTIALLY COMPRESSED GAS WHILE MAINTAINING IT AT A SUBSTANTIALLY CONSTANT VOLUME, PARTIALLY EXPANDING THE GAS FROM THE LAST-MENTIONED STEP,
Claim 2
Independent Claim
41 words
A METHOD OF COMPRESSING GAS COMPRISING, INTIALLY COMPRESSING THE GAS TO AN ELEVATED PRESSURE, FURTHER COMPRESSING THE INTIALLY-COMPRESSED GAS BY HEATING THE INTIALLY COMPRESSED GAS WHILE MAINTAINING IT AT A SUBSTANTIALLY CONSTANT VOLUME, PARTIALLY EXPANDING THE GAS FROM THE LAST-MENTIONED STEP,
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |