US3213858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum drying process
Assignee: AMF Inc
•
Filing: 1962-11-23
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Granted: 1965-10-26
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Henry B Merritt
- 👤 Robert C Geitz
- 👤 William J Nellen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:49
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/28; F26B17/284; A; A24; A24B; A24B15/00; A24B15/10; A24B15/12; A24B15/14; A24B3/00; A24B3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF FORMING A SELF-SUPPORTING TOBACCO SHEET FROM A SLURRY COMPRISING FINELY PARTICULATED TOBACCO AND A VOLATILIZABLE LIQUID CARRIER WHICH COMPRISES MAINTAINING A SUBSTANTIALLY IMPERMEABLE FILM-FORMING SURFACE AT A TEMPERATURE HIGHER THAN THE BOILING POINT OF THE LIQUID CARRIER IN THE SLURRY, LOCALLY PRECOOLING, PRIOR TO DEPOSITING SLURRY THEREON, SUCCESSIVE PORTIONS OF THE FILM-FORMING SURFACE, IMMEDIATELY DEPOSITING A SUBSTANTIALLY UNIFORM AND CONTINUOUS FILM OF THE SLURRY ON THE PRECOOLED PORTIONS OF SAID SURFACE, DIRECTING A GAS AT THE FILM AS IT IS FORMED ON SAID SURFACE TO PREVENT BOILING OF THE LIQUID CARRIER FROM THE DEPOSIT, DRYING THE FILM BY MAINTANING A HEAT SOURCE BELOW SAID FILM-FORMING SURFACE TO EVAPORATE THE LIQUID FROM THE DEPOSITED SLURRY AND REMOVING THE SHEET FROM SAID SURFACE.
Claim 2
Independent Claim
124 words
A METHOD OF FORMING A SELF-SUPPORTING TOBACCO SHEET FROM A SLURRY COMPRISING FINELY PARTICULATED TOBACCO AND A VOLATILIZABLE LIQUID CARRIER WHICH COMPRISES MAINTAINING A SUBSTANTIALLY IMPERMEABLE FILM-FORMING SURFACE AT A TEMPERATURE HIGHER THAN THE BOILING POINT OF THE LIQUID CARRIER IN THE SLURRY, LOCALLY PRECOOLING, PRIOR TO DEPOSITING SLURRY THEREON, SUCCESSIVE PORTIONS OF THE FILM-FORMING SURFACE, IMMEDIATELY DEPOSITING A SUBSTANTIALLY UNIFORM AND CONTINUOUS FILM OF THE SLURRY ON THE PRECOOLED PORTIONS OF SAID SURFACE, DIRECTING A GAS AT THE FILM AS IT IS FORMED ON SAID SURFACE TO PREVENT BOILING OF THE LIQUID CARRIER FROM THE DEPOSIT, DRYING THE FILM BY MAINTANING A HEAT SOURCE BELOW SAID FILM-FORMING SURFACE TO EVAPORATE THE LIQUID FROM THE DEPOSITED SLURRY AND REMOVING THE SHEET FROM SAID SURFACE.
References Cited (Backward Citations)
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Cited
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |