US4954543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating for increasing sensitivity of a radiation imageable polyacetylenic film
Assignee: ISP Investments LLC
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Filing: 1988-10-17
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Granted: 1990-09-04
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Expires: 2008-10-17
Abstract
Abstract The invention relates to an aqueous coating composition containing an N-alkyl lactam dispersing aid and a water soluble metal salt having an atomic number greater than 50 dispersed in between about 4 and about 50 wt. % of an aqueous binder solution compatible with a binder employed for crystalline polyacetylenic crystals used in an imaging process.
Inventors
- 👤 David F. Lewis
- 👤 Robert D. Schenfele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:32
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C09; C09D; C09D5/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/025; C08J2349/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
89 words
A dispersion composition comprising between about 0.001% and about 1.0% by weight of an N-C 10-22 alkyl lactam dispersing aid, a metal nitrate, acetate or persulfate salt of a metal having an atomic number of at least 50 or a mixture of said lactams or metal salts dispersed in between about 4% and about 50% by weight of an aqueous solution of a binder compatible with the binder of imageable polyacetylene crystals; said composition having a weight ratio of metal salt to binder between about 0.4:1 and about 2.5:1.
Claim 2
Dependent Claim
89 words
A dispersion composition comprising between about 0.001% and about 1.0% by weight of an N-C 10-22 alkyl lactam dispersing aid, a metal nitrate, acetate or persulfate salt of a metal having an atomic number of at least 50 or a mixture of said lactams or metal salts dispersed in between about 4% and about 50% by weight of an aqueous solution of a binder compatible with the binder of imageable polyacetylene crystals; said composition having a weight ratio of metal salt to binder between about 0.4:1 and about 2.5:1.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said salt is a salt of a metal having an atomic number of at least 78.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein said metal salt is a lead salt.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said N-alkyl lactam is N-alkyl pyrrolidone and said alkyl group contains from 10 to 14 carbon atoms.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein said N-alkyl lactam is N-dodecyl-2-pyrrolidone.
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein said metal salt contains lead nitrate.
Claim 8
Dependent Claim
23 words
The composition of claim 1 wherein said binder is an aqueous solution containing between about 1% and about 30% by weight of binder.
Claim 9
Dependent Claim
10 words
The composition of claim 7 wherein said binder is gelatin.
Claim 10
Dependent Claim
56 words
The composition of claim 1 containing from about 0.5% to about 1% by weight of said N-alkyl lactam, from about 1% to about 75% by weight metal salt and from about 4% to about 15% by weight of binder and wherein the total solids of said composition is between about 1% and about 60% by weight.
Claim 11
Dependent Claim
52 words
The composition of claim 9 wherein the weight ratio of metal salt to binder is between about 0.8:1 and about 1.5:1, the weight ratio of lactam to metal salt is between about 1:200 and about 1:10 and the total solids of the composition is between about 5% and about 30% by weight.
Claim 12
Dependent Claim
21 words
The composition of claim 10 wherein the weight ratio of lactam to metal salt is between about 1:60 and about 1:10.
Claim 13
Dependent Claim
56 words
The composition of claim 1 containing from about 0.5% to about 1% by weight N-dodecyl pyrrolidone, from about 20% to about 55% by weight of lead nitrate and from about 4% to about 15% by weight gelatin in aqueous solution, said composition having a total solids concentration of between about 5% and about 30% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |