US3115015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration apparatus and method
Assignee: Arthur D Little Inc
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Filing: 1962-07-30
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Granted: 1963-12-24
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Walter H Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/02; F25J1/0243; F25J1/0257; F25J1/0275; F25J1/0276; F25B; F25B9/00; F25B9/02; F25J1/0002; F25J1/0005; F25J1/0007; F25J1/001; F25J1/0261; F25B2309/00; F25B2309/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
REFRIGERATION APPARATUS, COMPRISING (A) A COLD CHAMBER OF CONSTANT VOLUME; (B) A PISTON MOVABLE WITHIN SAID CHAMBER AND ADAPTED TO DEFINE THEREIN FIRST AND SECOND COLD SUBCHAMBERS OF VARIABLE VOLUME; (C) HIGH-PRESSURE FLUID SUPPLY RESERVOIR; (D) LOW-PRESSURE FLUID EXHAUST RESERVOIR; (E) FIRST AND SECOND PASSAGES COMMUNICATING BETWEEN SAID FIRST AND SECOND SUBCHAMBERS, RESPECTIVELY, AND SAID RESERVOIRS; AND (F) HEAT EXCHANGE MEANS ASSOCIATED WITH SAID FIRST AND SECOND PASSAGES AND ADAPTED TO TRANSFER HEAT BETWEEN
Claim 2
Dependent Claim
74 words
REFRIGERATION APPARATUS, COMPRISING (A) A COLD CHAMBER OF CONSTANT VOLUME; (B) A PISTON MOVABLE WITHIN SAID CHAMBER AND ADAPTED TO DEFINE THEREIN FIRST AND SECOND COLD SUBCHAMBERS OF VARIABLE VOLUME; (C) HIGH-PRESSURE FLUID SUPPLY RESERVOIR; (D) LOW-PRESSURE FLUID EXHAUST RESERVOIR; (E) FIRST AND SECOND PASSAGES COMMUNICATING BETWEEN SAID FIRST AND SECOND SUBCHAMBERS, RESPECTIVELY, AND SAID RESERVOIRS; AND (F) HEAT EXCHANGE MEANS ASSOCIATED WITH SAID FIRST AND SECOND PASSAGES AND ADAPTED TO TRANSFER HEAT BETWEEN
References Cited (Backward Citations)
US2966035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |