Patent US4215031A successfully refreshed from Google Patents.
US4215031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickening additives for unsaturated polyester resins
Assignee: ChampionX LLC
•
Filing: 1979-02-14
•
Granted: 1980-07-29
•
Expires: 1999-02-14
Abstract
Abstract An unsaturated polyester resin which contains at least 0.3% by weight of silica particles having an ultimate particle size within the range of 4-70 millimicrons, whose particles have their surface coated with a quaternary ammonium salt which contains at least 1 organic radical of at least 6 carbon atoms in chain length.
Inventors
- 👤 Charles C. Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:21
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; B; B82; B82Y; B82Y30/00; C08K5/00; C08K5/16; C08K5/17; C08K9/00; C08K9/04; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/3063; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2004/80; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
An unsaturated polyester resin which contains at least 0.3% by weight of silica particles having an ultimate particle size within the range of 4-70 millimicrons, which particles have their surface coated with a quaternary ammonium salt which contains at least 1 organic radical of at least 6 carbon atoms in chain length.
Claim 2
Dependent Claim
52 words
An unsaturated polyester resin which contains at least 0.3% by weight of silica particles having an ultimate particle size within the range of 4-70 millimicrons, which particles have their surface coated with a quaternary ammonium salt which contains at least 1 organic radical of at least 6 carbon atoms in chain length.
Claim 3
Dependent Claim
21 words
The unsaturated polyester resin of claim 1 where the silica particles have an ultimate particle-size within the range of 8-20 millimicrons.
Claim 4
Dependent Claim
34 words
The unsaturated polyester of claim 2 where the quaternary ammonium salt has the following structural formula: ##STR2## where R is a mixture of C 8 and C 10 carbon chains with C 8 predominating.
Claim 5
Dependent Claim
78 words
A composition comprising an aliphatic hydrocarbon liquid and styrene in a weight ratio of aliphatic hydrocarbon liquid to styrene of at least 0.5:1 and from 10% by weight up to the saturation solubility of finely divided particles of silica having an average particle size of between 4-70 millimicrons with the surface of said silica particles being coated with a quaternary ammonium salt which contains at least 1 organic radical of at least 6 carbon atoms in chain length.
Claim 6
Dependent Claim
78 words
A composition comprising an aliphatic hydrocarbon liquid and styrene in a weight ratio of aliphatic hydrocarbon liquid to styrene of at least 0.5:1 and from 10% by weight up to the saturation solubility of finely divided particles of silica having an average particle size of between 4-70 millimicrons with the surface of said silica particles being coated with a quaternary ammonium salt which contains at least 1 organic radical of at least 6 carbon atoms in chain length.
Claim 7
Dependent Claim
20 words
The composition of claim 4 where the finely divided particles of silica have an average particle size between 8-20 millimicrons.
References Cited (Backward Citations)
US2597872A
Cited
US2760941A
Cited
US2692863A
Cited
US2740765A
Cited
US2974105A
Cited
US3635878A
Cited
US3916058A
Cited
US3932348A
Cited
US3974125A
Cited
US4110278A
Cited
US4081496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |