Patent US3640742A successfully refreshed from Google Patents.
US3640742A
Expired / Lapsed
US
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Plasticizer blend for cellulose esters
Assignee: Eastman Kodak Co
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Filing: 1967-07-03
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Granted: 1972-02-08
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Expires: 1987-07-03
Abstract
Abstract A cellulose ester plasticizer blend made from about 40 to 60 percent by weight of glyceryl triacetate with the remainder being primarily a poly(ethylene glycol) diacetate.
Inventors
- 👤 George P Touey
- 👤 Cephas H Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
Bonding plasticizer blend according to claim 1 wherein the poly(ethylene glycol) diacetate is selected from the group consisting of diethylene glycol diacetate, triethylene glycol diacetate, and tetraethylene glycol diacetate.
Claim 2
Dependent Claim
32 words
Bonding plasticizer blend according to claim 1 wherein about 40 to 50 percent by weight of glyceryl triacetate is blended with about 60 to 50 percent by weight of poly(ethylene glycol) diacetate.
Claim 3
Dependent Claim
29 words
Bonding plasticizer blend according to claim 3 wherein the poly(ethylene glycol) diacetate is selected from the group consisting of diethylene glycol diacetate, triethylene glycol diacetate and tetraethylene glycol diacetate.
Claim 4
Dependent Claim
28 words
Bonding plasticizer blend according to claim 1 wherein about 50 percent by weight of glyceryl triacetate is blended with about 50 percent by weight of poly(ethylene glycol) diacetate.
Claim 5
Dependent Claim
29 words
Bonding plasticizer blend according to claim 5 wherein the poly(ethylene glycol) diacetate is selected from the group consisting of diethylene glycol diacetate, triethylene glycol diacetate, and tetraethylene glycol diacetate.
References Cited (Backward Citations)
US2794239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |