US3674894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins modified with organic dibasic acid salts
Assignee: Unifrax I LLC
•
Filing: 1970-05-05
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Granted: 1972-07-04
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Expires: 1990-05-05
Abstract
Abstract Metal salts of alkanedioic and aromatic dibasic acids are used to improve one or more of the physical properties of certain thermoplastic and thermosetting resins, either before or after exposure to high temperatures.
Inventors
- 👤 James Economy
- 👤 Luis C Wohrer
- 👤 John H Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:48
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/263; C08G12/266; C08G8/00; C08G8/04; C08G8/08; C08G8/10; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
A composition according to claim 1 wherein the prepolymer is a styrene modified prepolymer.
Claim 2
Dependent Claim
21 words
A composition according to claim 1 wherein the salt is a Group IIA metal salt of a carbocyclic aromatic dicarboxylic acid.
Claim 3
Dependent Claim
13 words
A composition according to claim 3 wherein the acid is a phthalic acid.
Claim 4
Dependent Claim
14 words
A composition according to claim 3 wherein the metal salt is a calcium salt.
Claim 5
Dependent Claim
13 words
A composition accordiNg to claim 3 wherein the salt is a calcium phthalate.
Claim 6
Dependent Claim
34 words
A polymerizable composition consisting essentially of a styrene modified polyester prepolymer containing ethylenic unsaturation and from about 5 percent to about 15 percent, calculated on the weight of the prepolymer, of a calcium phthalate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |