US3240735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyesters of bisphenols and dicarboxylic acids having increased modulus of elasticity due to presence of stiffness improving additives
Assignee: Eastman Kodak Co
•
Filing: 1961-09-14
•
Granted: 1966-03-15
•
Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Gilkey Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08L; C08L67/00; C08L67/02; C08L67/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A FILM-FORMING COMPOSITION CONSISTING ESSENTIALLY OF FROM 90 TO 60 WEIGHT PERCENT OF A THERMOPLASTIC POLYMER AND FROM 10 TO 40 WEIGHT PERCENT OF A STIFFNESS IMPROVING ADDITIVES WHEREBY THE YOUNG''S MODULUS OF ELASTICITY OF A FILM OF SAID COMPOSITION IS INCREASED BY AT LEAST 1X10**5 POUNDS PER SQUARE INCH, SAID POLYMER BEING A LINEAR POLYESTER OF AT LEAST ONE BIFUNCTIONAL DICARBOXYLIC ACID AND AT LEAST ONE BIFUNCTIONAL DISPHENOL AND SAID ADDITIVE BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
81 words
A FILM-FORMING COMPOSITION CONSISTING ESSENTIALLY OF FROM 90 TO 60 WEIGHT PERCENT OF A THERMOPLASTIC POLYMER AND FROM 10 TO 40 WEIGHT PERCENT OF A STIFFNESS IMPROVING ADDITIVES WHEREBY THE YOUNG''S MODULUS OF ELASTICITY OF A FILM OF SAID COMPOSITION IS INCREASED BY AT LEAST 1X10**5 POUNDS PER SQUARE INCH, SAID POLYMER BEING A LINEAR POLYESTER OF AT LEAST ONE BIFUNCTIONAL DICARBOXYLIC ACID AND AT LEAST ONE BIFUNCTIONAL DISPHENOL AND SAID ADDITIVE BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF:
References Cited (Backward Citations)
US2734879A
Cited
US1987228A
Cited
US2590910A
Cited
DE1111389B
Cited
US2856379A
Cited
US2968639A
Cited
US3065204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |