Patent US4077930A successfully refreshed from Google Patents.
US4077930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-inverting emulsions of dialkyldiallyl ammonium chloride polymers and copolymers
Assignee: ECC SPECIALTY CHEMICALS Inc
•
Filing: 1976-02-24
•
Granted: 1978-03-07
•
Expires: 1996-02-24
Abstract
Abstract Self-inverting emulsion polymers and their use as drainage aids, retention aids, saveall flotation aids and process water flocculants.
Inventors
- 👤 Sim Koei Lim
- 👤 Arnold Eugene Bloomquist
- 👤 Raymond Joseph Schaper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:07
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/37; D21H17/41; D21H17/44; D21H17/45; D21H17/455
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A stable, self-inverting water-in-oil dimethyl diallyl ammonium chloride polymer-containing emulsion prepared by a process which comprises polymerizing the corresponding monomer or monomers at a temperature at from about 0° to about 100° C. with agitation in the presence of water, an inert hydrophobic liquid and a free radical catalyst, and also in the presence of at least 20 percent by weight, based on the weight of the oil phase, of an emulsifier having an HLB of at least 7, and continuing the polymerization until the reaction is substantially complete.
Claim 2
Dependent Claim
89 words
A stable, self-inverting water-in-oil dimethyl diallyl ammonium chloride polymer-containing emulsion prepared by a process which comprises polymerizing the corresponding monomer or monomers at a temperature at from about 0° to about 100° C. with agitation in the presence of water, an inert hydrophobic liquid and a free radical catalyst, and also in the presence of at least 20 percent by weight, based on the weight of the oil phase, of an emulsifier having an HLB of at least 7, and continuing the polymerization until the reaction is substantially complete.
Claim 3
Dependent Claim
23 words
A stable, self-inverting water-in-oil polymer-containing emulsion as in claim 1 wherein the polymer is a polymer of dimethyl diallyl ammonium chloride and acrylamide.
Claim 4
Dependent Claim
27 words
A stable, self-inverting water-in-oil polymer-containing emulsion as in claim 1 wherein the polymer is a polymer of dimethyl diallyl ammonium chloride, diethyl diallyl ammonium chloride and acrylamide.
Claim 5
Dependent Claim
27 words
A stable, self-inverting water-in-oil polymer-containing emulsion as in claim 1 wherein the polymer is a polymer of dimethyl diallyl ammonium chloride, 2-acrylamido-2-methyl propane sulfonic acid and acrylamide.
Claim 6
Dependent Claim
31 words
A stable, self-inverting water-in-oil polymer-containing emulsion as in claim 1 wherein the polymer is a polymer of dimethyl diallyl ammonium chloride, diethyl diallyl ammonium chloride, 2-acrylamido-2-methyl propane sulfonic acid and acrylamide.
References Cited (Backward Citations)
US2980657A
Cited
US3147218A
Cited
US3284393A
Cited
US3336269A
Cited
US3412019A
Cited
US3624019A
Cited
US3692673A
Cited
US3806485A
Cited
US3920599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |