Patent US4328332A successfully refreshed from Google Patents.
US4328332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing fluorescent resin for ink jet printers
Assignee: Bantec Inc
•
Filing: 1981-06-14
•
Granted: 1982-05-04
•
Expires: 2001-06-14
Abstract
Abstract A fluorescent resin useful in water based ink jet printing based upon both molecular weight and degree of crosslinking of the resin during the manufacture is made utilizing trimellitic anhydrides, propylene glycol, neopentyl glycol, or both, and zinc acetate.
Inventors
- 👤 Larry J. Hayes
- 👤 Keith L. Reddick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:54
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A process for making a polyester resin comprising the steps of: blending a mixture of trimellitic anhydride, a glycol chosen from either 1,3-propanediol or 2,2-dimethyl-1,3-propanediol or a mixture thereof and zinc acetate in a resin kettle, while blending the mixture raise the kettle temperature to about 150° C., maintain the kettle temperature for at least 30 minutes to permit melting and formation of a homogeneous mixture, increase the kettle temperature to about 180° C. and maintain the temperature until distillation of the water amounts to 0.03 to 0.04 of the charge and then immediately remove mixture and cool to room temperature.
Claim 2
Dependent Claim
101 words
A process for making a polyester resin comprising the steps of: blending a mixture of trimellitic anhydride, a glycol chosen from either 1,3-propanediol or 2,2-dimethyl-1,3-propanediol or a mixture thereof and zinc acetate in a resin kettle, while blending the mixture raise the kettle temperature to about 150° C., maintain the kettle temperature for at least 30 minutes to permit melting and formation of a homogeneous mixture, increase the kettle temperature to about 180° C. and maintain the temperature until distillation of the water amounts to 0.03 to 0.04 of the charge and then immediately remove mixture and cool to room temperature.
Claim 3
Dependent Claim
11 words
The process according to claim 1 wherein the glycol is 1,3-propanediol.
Claim 4
Dependent Claim
11 words
The process according to claim 1 wherein the glycol is 2,2-dimethyl-1,3-propanediol.
Claim 5
Dependent Claim
16 words
The process according to claim 1 wherein a shearing blade is used in blending the mixture.
Claim 6
Dependent Claim
16 words
The process according to claim 1 wherein the glycol is a mixture of 1,3-propanediol and 2,2-dimethyl-1,3-propanediol.
Claim 7
Dependent Claim
17 words
The resin according to claim 1 wherein the resin has an acid number of 100 to 350.
Claim 8
Dependent Claim
17 words
The resin according to claim 1 wherein the resin has a molecular weight of 500 to 5000.
Claim 9
Dependent Claim
17 words
The process according to claim 1 wherein the trimellitic anhydride to glycol ratio is 1:1 to 1:1.5.
References Cited (Backward Citations)
US3053783A
Cited
US3068206A
Cited
US3499058A
Cited
US3812054A
Cited
US4024111A
Cited
US4136089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |