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Patent US4687798A successfully refreshed from Google Patents.
US4687798A
Expired / Lapsed
US
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Solvent cement
Assignee: Individual
•
Filing: 1986-01-27
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Granted: 1987-08-18
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Expires: 2006-01-27
Abstract
Abstract The present invention describes novel solvent cements which are a combination of a solvent which is a 5- or 6-membered ring lactam and a cosolvent which is one or more lower alkanols and/or one or more lower alkyl esters of lower alkanoic acids and, optionally, include a water-insoluble polymer such as PVC or ABS.
Inventors
- 👤 Lloyd H. King, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:01
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/125; C08J3/00; C08J3/02; C08J3/09; C08J3/091
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A solvent cement for joining water insoluble polymers wherein the solvent cement exceeds the standard specified in ASTM Bulletin D-2564-80, comprising about 10 to 15% of a water soluble polymer, a solvent comprised of ethyl acetate and N-methyl-2-pyrrolidone with ethyl acetate ranging from about 3% by weight to about 50% by weight, with the balance N-methyl-2-pyrrolidone.
Claim 2
Dependent Claim
56 words
A solvent cement for joining water insoluble polymers wherein the solvent cement exceeds the standard specified in ASTM Bulletin D-2564-80, comprising about 10 to 15% of a water soluble polymer, a solvent comprised of ethyl acetate and N-methyl-2-pyrrolidone with ethyl acetate ranging from about 3% by weight to about 50% by weight, with the balance N-methyl-2-pyrrolidone.
Claim 3
Dependent Claim
12 words
A solvent cement according to claim 1 wherein the polymer is poly(vinylchloride).
Claim 4
Dependent Claim
12 words
A solvent cement according to claim 1 wherein the polymer is ABS.
Claim 5
Dependent Claim
17 words
A solvent cement according to claim 1 wherein the polymer is a mixture of poly(vinylchloride) and ABS.
Claim 6
Dependent Claim
21 words
A solvent cement according to claim 1 wherein a thixotropic agent is included in an amount of one to five percent.
Claim 7
Dependent Claim
14 words
A solvent cement according to claim 1 wherein the thixotripic agent is colloidal silica.
References Cited (Backward Citations)
US2616868A
Cited
GB1036489A
Cited
US3576751A
Cited
US3764384A
Cited
US4055515A
Cited
US4098719A
Cited
SU711059A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |