Patent US4416974A successfully refreshed from Google Patents.
US4416974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation curable ceramic pigment composition
Assignee: Hercules LLC
•
Filing: 1981-11-05
•
Granted: 1983-11-22
•
Expires: 2001-11-05
Abstract
Abstract A radiation curable printing medium suitable for screen printing on glass, metal and ceramics which is to be cured and subsequently fired, comprising (a) 4 to 25% by weight of a polymerizable, liquid prepolymer containing at least about two ethylenically unsaturated end groups; (b) 4 to 15% by weight of at least one ethylenically unsaturated polymerizable monomer containing a polar functional group; (c) 60 to 90% by weight of a ceramic frit; and (d) 0.02 to 2% by weight of a polymerization inhibitor.
Inventors
- 👤 Bernard J. Scheve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; B; B41; B41M; B41M1/00; B41M1/26; B41M1/34; B41M7/00; B41M7/0045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A radiation curable solvent-free printing medium suitable for screen printing on glass, metal and ceramics, radiation curing and subsequent firing, comprising (a) about 2 to 25% by weight of a polymerizable liquid prepolymer comprising hydroxyl terminated polyester, polyether or polyester-polyether backbones containing at least about two ethylenically unsaturated end groups and having a number average molecular weight of from about 15,000 to about 80,000; (b) about 2 to 15% by weight of at least one ethylenically unsaturated, polymerizable monomer selected from acrylate and methacrylate containing a polar functional group; (c) about 60 to 90% by weight of a ceramic frit; and (d) about 0.02 to 2% by weight of a polymerization inhibitor.
Claim 2
Dependent Claim
112 words
A radiation curable solvent-free printing medium suitable for screen printing on glass, metal and ceramics, radiation curing and subsequent firing, comprising (a) about 2 to 25% by weight of a polymerizable liquid prepolymer comprising hydroxyl terminated polyester, polyether or polyester-polyether backbones containing at least about two ethylenically unsaturated end groups and having a number average molecular weight of from about 15,000 to about 80,000; (b) about 2 to 15% by weight of at least one ethylenically unsaturated, polymerizable monomer selected from acrylate and methacrylate containing a polar functional group; (c) about 60 to 90% by weight of a ceramic frit; and (d) about 0.02 to 2% by weight of a polymerization inhibitor.
Claim 3
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyester.
Claim 4
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyester-polyether.
Claim 5
Dependent Claim
23 words
A medium according to claim 1 wherein the polymerizable liquid prepolymer having at least about two ethylenically unsaturated end groups is a polyether.
Claim 6
Dependent Claim
12 words
A medium according to claim 2 wherein the polyester is isocyanate modified.
Claim 7
Dependent Claim
12 words
A medium according to claim 3 wherein the polyesterpolyether is isocyanate modified.
Claim 8
Dependent Claim
12 words
A medium according to claim 4 wherein the polyether is isocyanate modified.
References Cited (Backward Citations)
US2892734A
Cited
US3644120A
Cited
US3615457A
Cited
US3573908A
Cited
US3661576A
Cited
US3794494A
Cited
US3876432A
Cited
US3982941A
Cited
US4064287A
Cited
US4188222A
Cited
US4113592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |