US3243308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amylosic films and method of making the same
Assignee: Department OF AGRICULTURE AND INSPEC
•
Filing: 1963-10-23
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Granted: 1966-03-29
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 John W Barger
- 👤 Jr William J Haggerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:17
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/20; C08L; C08L3/00; C08L3/02; C08L3/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
THE METHOD OF MANUFACTURING AMYLOSIC STARCH FILMS WHICH COMPRISES FORMING A COMPOSITION COMPRISING AMYLOSIC SOLID MATERIALS AND AN AMOUNT OF WATER NOT IN EXCESS OF ABOUT 50% BY WEIGHT OF SAID COMPOSITION, HEATING SAID COMPOSITION UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 250*F. TO CONVERT IT INTO A HOMOGENEOUS PLASTIC MASS AND THEN EXTRUDING SAID MASS AS A SELF-SUPPORTING FILM AT A TEMPERATURE NOT OVER ABOUT 210*F.
Claim 2
Independent Claim
69 words
THE METHOD OF MANUFACTURING AMYLOSIC STARCH FILMS WHICH COMPRISES FORMING A COMPOSITION COMPRISING AMYLOSIC SOLID MATERIALS AND AN AMOUNT OF WATER NOT IN EXCESS OF ABOUT 50% BY WEIGHT OF SAID COMPOSITION, HEATING SAID COMPOSITION UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 250*F. TO CONVERT IT INTO A HOMOGENEOUS PLASTIC MASS AND THEN EXTRUDING SAID MASS AS A SELF-SUPPORTING FILM AT A TEMPERATURE NOT OVER ABOUT 210*F.
Claim 3
Dependent Claim
67 words
AN ARTICLE OF MANUFACTURE COMPRISING A FLEXIBLE SELF-SUPPORTING STARCH FILM CONTAINING AT LEAST ABOUT 50% BY WEIGHT OF AMYLOSIC MATERIALS EXTRUDED AT A TEMPERATURE NOT OVER ABOUT 210*F. FORM A HOT MELT HELD UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 250*F. WHICH FILM HAS A THICKNESS WITHIN THE RANGE OF ABOUT 1 TO ABOUT 10 MILS AND A TENSILE STRENGTH OF AT LEAST 5500 P.S.I.
Claim 4
Dependent Claim
67 words
AN ARTICLE OF MANUFACTURE COMPRISING A FLEXIBLE SELF-SUPPORTING STARCH FILM CONTAINING AT LEAST ABOUT 50% BY WEIGHT OF AMYLOSIC MATERIALS EXTRUDED AT A TEMPERATURE NOT OVER ABOUT 210*F. FORM A HOT MELT HELD UNDER PRESSURE AT A TEMPERATURE OF AT LEAST ABOUT 250*F. WHICH FILM HAS A THICKNESS WITHIN THE RANGE OF ABOUT 1 TO ABOUT 10 MILS AND A TENSILE STRENGTH OF AT LEAST 5500 P.S.I.
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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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |