US3772076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of epihalohydrin and polymers of diallylamine and their use in paper
Assignee: Hercules LLC
•
Filing: 1972-03-14
•
Granted: 1973-11-13
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Expires: 1992-03-14
Abstract
Abstract Water-soluble, alkaline curing resins which are the reaction products of an epihalohydrin and a polymer of a diallylamine are disclosed. The resins are particularly useful as wet strength agents for paper and additionally give superior dry strength to paper.
Inventors
- 👤 G Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F8/00; D21H17/38
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
11 words
The paper product of claim 1 wherein (A) is a homopolymer.
Claim 2
Dependent Claim
11 words
The paper product of claim 2 wherein the epihalohydrin is epichlorohydrin.
Claim 3
Dependent Claim
13 words
The paper product of claim 3 wherein (A) is a homopolymer of diallylamine.
Claim 4
Dependent Claim
13 words
The paper product of claim 3 wherein (A) is a homopolymer of N-methyldiallylamine.
Claim 5
Dependent Claim
14 words
The paper product of claim 3 wherein (A) is a homopolymer of Beta -propionamidodiallylamine.
Claim 6
Dependent Claim
31 words
The paper product of claim 1 wherein (A) is a copolymer having units of said formula and units of at least one different monomer selected from vinylidene monomers and sulfer dioxide.
Claim 7
Dependent Claim
11 words
The paper product of claim 7 wherein the epihalohydrin is epichlorohydrin.
Claim 8
Dependent Claim
16 words
The paper product of claim 8 wherein (A) is a copolymer of N-methyldiallylamine and sulfur dioxide.
Claim 9
Dependent Claim
16 words
The paper product of claim 8 wherein (A) is a copolymer of N-methyldiallylamine and dimethyldiallylammonium chloride.
Claim 10
Dependent Claim
15 words
The paper product of claim 8 wherein (A) is a copolymer of N-methyldiallylamine and diallylamine.
Claim 11
Dependent Claim
15 words
The paper product of claim 8 wherein (A) is a copolymer of diallylamine and acrylamide.
Claim 12
Dependent Claim
15 words
The paper product of claim 8 wherein (A) is a copolymer of N-methyldiallylamine and acrylamide.
Claim 13
Dependent Claim
17 words
The paper product of claim 8 wherein (A) is a terpolymer of diallylamine, acrylamide and sulfur dioxide.
References Cited (Backward Citations)
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US3375233A
Cited
US3442754A
Cited
US3496121A
Cited
US3332901A
Cited
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Cited
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Cited
US3640840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |