Patent US3899468A successfully refreshed from Google Patents.
US3899468A
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Novel interpolymer of amine, aldehyde and sulfanilamide
Assignee: Cities Service Co
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Filing: 1974-06-27
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Granted: 1975-08-12
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Expires: 1994-06-27
Abstract
Abstract The novel interpolymers of the invention are water-insoluble amine-sulfonamide-aldehyde interpolymers in which the sulfonamidealdehyde units correspond to the formula: WHEREIN Q is the aldehyde residue and R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido. According to a preferred embodiment of the invention, the interpolymers are sulfanilamide-urea-formaldehyde interpolymers.
Inventors
- 👤 Shirley H Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
19 words
A WATER-INSOUBLE AMINE-SULFONAMIDE-ALDEHYDE INTERPOLYMER CONSISTING ESSENTIALLY OF (A) ABOUT 50-99 MOL PERCENT OF SULFONAMIDE-ADEHYDE UNITS CORROSPONDING TO THE FORMULA:
Claim 2
Dependent Claim
19 words
A WATER-INSOUBLE AMINE-SULFONAMIDE-ALDEHYDE INTERPOLYMER CONSISTING ESSENTIALLY OF (A) ABOUT 50-99 MOL PERCENT OF SULFONAMIDE-ADEHYDE UNITS CORROSPONDING TO THE FORMULA:
Claim 3
Dependent Claim
16 words
The interpolymer of claim 1 which contains a total of about 2-10 sulfonamide-aldehyde and amine-aldehyde units.
Claim 4
Dependent Claim
14 words
The interpolymer of claim 1 which contains about 50-90 mol percent of sulfonamide-aldehyde units.
Claim 5
Dependent Claim
9 words
The interpolymer of claim 1 wherein R is hydrogen.
Claim 6
Dependent Claim
17 words
The interpolymer of claim 1 wherein the sulfonamide portion of the sulfonamide-aldehyde units corresponds to the formula:
Claim 7
Dependent Claim
15 words
The interpolymer of claim 1 wherein the aldehyde is an alkanal containing 1-5 carbon atoms.
Claim 8
Dependent Claim
10 words
The interpolymer of claim 6 wherein the alkanal is formaldehyde.
Claim 9
Dependent Claim
13 words
The interpolymer of claim 1 wherein the sulfonamide-aldehyde units correspond to the formula:
Claim 10
Dependent Claim
12 words
The interpolymer of claim 1 wherein the amine-aldehyde units are urea-formaldehyde units.
Claim 11
Dependent Claim
12 words
The interpolymer of claim 1 wherein the amine-aldehyde units are melamine-formaldehyde units.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |