Patent US4155655A successfully refreshed from Google Patents.
Patent US2497501A successfully refreshed from Google Patents.
US2497501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of coffee, etc.
Assignee: ROSS M CARRELL
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Filing: 1946-04-27
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Granted: 1950-02-14
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Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Loran B Himmel
- 👤 Ruth V Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:06
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/04; A23F5/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF ROASTING COFFEE PARTICLES WHICH COMPRISES SUSPENDING THE PARTICLES IN AN UPWARDLY MOVING GASEOUS STREAM HAVING A DENSITY BELOW THAT OF THE PARTICLES, MAINTAINING THE TEMPERATURE OF THE GASEOUS STREAM SUFFICIENTLY HIGH TO PERMIT ROASTING OF THE PARTICLE, SUBJECTING THE SUSPENDED PARTICLE TO AN HIGH FREQUENCY ELECTRICAL FIELD TO ROAST INTERNALLY AND CONTROLLING THE RATE OF UPWARD FLOW OF HE GASEOUS STREAM SO THAT THE PARTICLES REMAIN SUSPENDED IN THE FIELD UNTIL A SUBSTANTIAL REDUCTION OF THE DENSITY OF THE PARTICLE HAS OCCURRED AND THEREAFTER ARE SWEPT FROM THE FIELD BY THE GASEOUS STREAM.
Claim 2
Independent Claim
96 words
A METHOD OF ROASTING COFFEE PARTICLES WHICH COMPRISES SUSPENDING THE PARTICLES IN AN UPWARDLY MOVING GASEOUS STREAM HAVING A DENSITY BELOW THAT OF THE PARTICLES, MAINTAINING THE TEMPERATURE OF THE GASEOUS STREAM SUFFICIENTLY HIGH TO PERMIT ROASTING OF THE PARTICLE, SUBJECTING THE SUSPENDED PARTICLE TO AN HIGH FREQUENCY ELECTRICAL FIELD TO ROAST INTERNALLY AND CONTROLLING THE RATE OF UPWARD FLOW OF HE GASEOUS STREAM SO THAT THE PARTICLES REMAIN SUSPENDED IN THE FIELD UNTIL A SUBSTANTIAL REDUCTION OF THE DENSITY OF THE PARTICLE HAS OCCURRED AND THEREAFTER ARE SWEPT FROM THE FIELD BY THE GASEOUS STREAM.
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |