US3898336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insoluble polymeric quaternary trihalogen salt coated substrates
Assignee: California Institute of Technology
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Filing: 1972-05-11
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Granted: 1975-08-05
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Expires: 1992-05-11
Abstract
Abstract A coated substrate is formed by dissolving in solvent a linear quaternary ammonium polymer of the formula: WHERE R1 and R2 are each alkyl of 1-10 carbon atoms; R3 and R4 are each alkylene, alkenylene, arylene, aralkylene, alkarylene, alkyleneoxy, alkylenethio of 1 to 100 carbon atoms; n is an integer greater than 2; and X is a halogen selected from Cl , Br and I ; immersing the substrate in the solution and adding to the solution a halogen source selected from the group consisting of Br and I to precipitate on said substrate an insoluble trihalide salt of said polymer.
Inventors
- 👤 Alan Rembaum
- 👤 Robert F Landel
- 👤 Hendrik Keyzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:29
CPC Classifications
A; A01; A01N; A01N33/00; A01N33/02; A01N33/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; D; D06; D06M; D06M16/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2915
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
33 words
A METHOD OF FORMING A COATED SUBSTRATE COMPRISING THE STEPS OF: DISSOLVING IN A SOLVENT LINEAR, QUARTERNARY AMMONIUM POLYMER SALT HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000 AND HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
33 words
A METHOD OF FORMING A COATED SUBSTRATE COMPRISING THE STEPS OF: DISSOLVING IN A SOLVENT LINEAR, QUARTERNARY AMMONIUM POLYMER SALT HAVING A MOLECULAR WEIGHT OF AT LEAST 10,000 AND HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said substrate is solid particulate inorganic material.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said substrate is a fibrous material.
Claim 5
Dependent Claim
31 words
The method of claim 1 wherein said soluble polymer salt solution is formed by dissolving said salt in a solvent selected from the group consisting of water and organic polar solvents.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said halogen source comprises a mixture of I2 and KI.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said halogne source comprises a mixture of Br2 and KBr.
Claim 8
Dependent Claim
51 words
The method of claim 1 wherein said soluble salt contains one halogen atom per each nitrogen in the polymer and further providing: contacting said soluble salt with sufficient additional halogen to obtain three halogen atoms for at least some of the nitrogens in the polymer suffiCient to form said insoluble product.
Claim 9
Dependent Claim
17 words
A method according to claim 1 in which the insoluble polymer salt contains 70-85 weight percent halogen.
Claim 10
Dependent Claim
25 words
A method according to claim 1 in which there are at least 3 carbon atoms separation between nitrogen atoms in the backbone of the polymer.
Claim 11
Dependent Claim
15 words
A method according to claim 1 in which R3 and R4 contain 3-4 carbon atoms.
Claim 12
Dependent Claim
12 words
The method of claim 3 wherein said substrate is a surgical suture.
Claim 13
Dependent Claim
11 words
The method of claim 3 wherein said substrate is a cloth.
Claim 14
Dependent Claim
26 words
A substrate having deposited thereon an insoluble trihalide salt of a linear quaternary ammonium polymer having a molecular weight above 10,000 and having the general formula:
Claim 15
Dependent Claim
26 words
A substrate having deposited thereon an insoluble trihalide salt of a linear quaternary ammonium polymer having a molecular weight above 10,000 and having the general formula:
Claim 16
Dependent Claim
13 words
The product of claim 13 wherein said substrate is solid particulate inorganic material.
Claim 17
Dependent Claim
11 words
The product of claim 13 wherein said substrate is fibrous material.
Claim 18
Dependent Claim
12 words
The product of claim 15 wherein said substrate is a surgical suture.
Claim 19
Dependent Claim
11 words
The product of claim 15 wherein said substrate is a cloth.
Claim 20
Dependent Claim
51 words
The substrate of claim 13 wherein said salt is formed from the reaction of linear polymer containing quaternizable nitrogens dissolved in a solvent with a halogen source under conditions sufficient to add halogen to said linear polymer at said nitrogens and precipitate the resulting halogen containing polymer salt from said solution.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |