Patent US5633919A successfully refreshed from Google Patents.
US2656571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing amylose films
Assignee: Individual
•
Filing: 1949-11-22
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Granted: 1953-10-27
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Expires: 1969-11-22
Abstract
No abstract record available.
Inventors
- 👤 Howard A Davis
- 👤 Ivan A Wolff
- 👤 James E Cluskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:10
CPC Classifications
C; C08; C08L; C08L3/00; C08L3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF FORMING AMYLOSE-CONTAINING FILMS COMPRISING DISSOLVING AN AMYLACEOUS SUBSTANCE COMPRISING AT LEAST 50 PERCENT AMYLOSE IN AN AQUEOUS SOLUTION CONTAINING A SATURATING AMOUNT OF AN AMYLOSE COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF BUTANOL AND PENTANOL IN PROPORTIONS TO FORM A 2 TO 30 PERCENT AMYLOSE SOLUTION, MAINTAINING THE SOLUTION ABOVE ITS GELATION TEMPERATURE, CASTING THE SOLUTION UPON A SURFACE TO FORM AN AQUEOUS FILM AND REMOVING SAID COMPLEXING AGENT WHILE MAINTAINING THE TEMPERATURE OF SAID FILM ABOVE ITS GELATION TEMPERATURE.
Claim 2
Independent Claim
84 words
THE METHOD OF FORMING AMYLOSE-CONTAINING FILMS COMPRISING DISSOLVING AN AMYLACEOUS SUBSTANCE COMPRISING AT LEAST 50 PERCENT AMYLOSE IN AN AQUEOUS SOLUTION CONTAINING A SATURATING AMOUNT OF AN AMYLOSE COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF BUTANOL AND PENTANOL IN PROPORTIONS TO FORM A 2 TO 30 PERCENT AMYLOSE SOLUTION, MAINTAINING THE SOLUTION ABOVE ITS GELATION TEMPERATURE, CASTING THE SOLUTION UPON A SURFACE TO FORM AN AQUEOUS FILM AND REMOVING SAID COMPLEXING AGENT WHILE MAINTAINING THE TEMPERATURE OF SAID FILM ABOVE ITS GELATION TEMPERATURE.
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) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |