US3673110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-modified cellulose
Assignee: Procter and Gamble Co
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Filing: 1970-12-28
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Granted: 1972-06-27
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Expires: 1990-12-28
Abstract
Abstract An adsorbent mass useful in adsorbing dirt and anionic dye molecules in laundering operations and the like is prepared by modifying a cellulosic substrate to render same anionic and thereafter coating the modified surface with certain nitrogen compounds.
Inventors
- 👤 James B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:38
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/046; C11D1/00; C11D1/38; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/228; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/61
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is phosphorylated cotton.
Claim 2
Dependent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is sulfatoethylated cotton.
Claim 3
Dependent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is sulfoethylated cotton.
Claim 4
Dependent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is phosphatoethylated cotton.
Claim 5
Dependent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is carboxymethylated cotton.
Claim 6
Dependent Claim
19 words
An adsorbent mass according to claim 1 wherein the water-insoluble cellulosic substrate having an anionic surface is succinated cotton.
Claim 7
Dependent Claim
196 words
An adsorbent mass according to claim 1 comprising cotton having a surface which is from about 20 percent to about 100 percent phosphorylated on which is chemically affixed from about 0.1 percent to about 30 percent, by weight, of a member selected from the group consisting of nitrogen compounds of the formulas wherein R1 is selected from the group consisting of alkyl and alkanoyl groups containing from about six to about 22 carbon atoms, R2 is selected from the group consisting of alkyl and alkanoyl groups containing from about one to about 22 carbon atoms, R3 and R4 are each selected from the group consisting of alkyl and alkanoyl groups containing from about one to about four carbon atoms, X is a member selected from the group consisting of fluoride, chloride, bromide, iodide and hydroxide, y is an integer of from 1 to 4, z is an integer greater than 1, R5 is selected from the group consisting of hydrogen, and alkyl and alkanoyl groups containing from about six to about 22 carbon atoms, at least 5 percent of said R5 groups being alkyl or alkanoyl groups. containing from about six to about 22 carbon atoms.
Claim 8
Dependent Claim
51 words
An adsorbent mass according to claim 8 wherein the substrate material is cotton which is from about 20 percent to about 100 percent phosphorylated and wherein the nitrogen compound chemically affixed to the surface thereof is polyethylenimine having from about 20 percent to about 100 percent of the nitrogen atoms stearoylated.
Claim 9
Dependent Claim
196 words
A process for preparing an adsorbent mass comprising the steps of: (1) treating a water-insoluble cellulosic substrate with a reagent which renders the surface of said substrate anionic; and (2) contacting said anionic substrate prepared in step (1) with a member selected from the group consisting of nitrogen compounds of the formulas wherein R1 is selected from the group consisting of alkyl and alkanoyl groups containing from about six to about 22 carbon atoms, R2 is selected from the group consisting of alkyl and alkanoyl groups containing from about 1 to about 22 carbon atoms, R3 and R4 are each selected from the group consisting of alkyl and alkanoyl groups containing from about one to about four carbon atoms, X is a member selected from the group consisting of fluoride, chloride, bromide, iodide and hydroxide, y is an integer of from 1 to 4, z is an integer greater than 1, R5 is selected from the group consisting of hydrogen, and alkyl and alkanoyl groups containing from about six to about 22 carbon atoms, at least 5 percent of said R5 groups being alkyl or alkanoyl groups containing from about six to about 22 carbon atoms.
Claim 10
Dependent Claim
37 words
A process according to claim 10 wherein the reagent for rendering the cellulosic substrate anionic is a member selecteD from the group consisting of 2-chloroethylsulfuric acid, 2-chloroethylsulfonic acid, 2-chloroethylphosphoric acid, chloromethylacetic acid, succinic anhydride and phosphoric acid.
Claim 11
Dependent Claim
12 words
A process according to claim 10 wherein the cellulosic substrate is cotton.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |