US4372815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for upgrading paper and the product formed thereby
Assignee: Fort James Corp
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Filing: 1981-08-17
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Granted: 1983-02-08
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Expires: 2001-08-17
Abstract
Abstract This invention is directed to a method for upgrading cellulose by treating same with a chemical to produce a cellulose sheet having substantially increased absorbency, bulk and softness properties. The chemical system comprises the reaction product of a cyanuric halide compound and an alkylene oxide compound, respectively.
Inventors
- 👤 David D. Newkirk
- 👤 Darrel L. Wilhoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/11; C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2639; D21H17/20; D21H17/33; D21H17/46; D21H17/53
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A method for upgrading cellulose sheets by substantially increasing the absorbency, bulk, and softness thereof, which comprises treating cellulose with a chemical compound having the following general formula: ##STR2## in which X represents halogen; R represents an alkylene group, either straight chain or branched, having from one to five carbon atoms; n is from about 2 up to about 30; and Z is a halogen substituted 1,3,5-triazinyl group.
Claim 2
Independent Claim
68 words
A method for upgrading cellulose sheets by substantially increasing the absorbency, bulk, and softness thereof, which comprises treating cellulose with a chemical compound having the following general formula: ##STR2## in which X represents halogen; R represents an alkylene group, either straight chain or branched, having from one to five carbon atoms; n is from about 2 up to about 30; and Z is a halogen substituted 1,3,5-triazinyl group.
Claim 3
Dependent Claim
9 words
The method of claim 1, wherein X represents chlorine.
Claim 4
Dependent Claim
17 words
The method of claim 1, wherein R represents an alkylene group having one to two carbon atoms.
Claim 5
Dependent Claim
21 words
The method of claim 2, wherein R is an alkylene group having one carbon atom, and Z is a 4,6-dichloro-1,3,5-triazinyl group.
Claim 6
Dependent Claim
63 words
An absorbent, bulky, and soft cellulose sheet which comprises cellulose which has been treated with a chemical compound having the following general formula: ##STR3## in which X represents halogen; R represents an alkylene group, either straight chain or branched, having from one to five carbon atoms; n is from about 2 up to about 30; and Z is a halogen substituted 1,3,5-triazinyl group.
Claim 7
Dependent Claim
63 words
An absorbent, bulky, and soft cellulose sheet which comprises cellulose which has been treated with a chemical compound having the following general formula: ##STR3## in which X represents halogen; R represents an alkylene group, either straight chain or branched, having from one to five carbon atoms; n is from about 2 up to about 30; and Z is a halogen substituted 1,3,5-triazinyl group.
Claim 8
Dependent Claim
9 words
The product of claim 5, wherein X represents chlorine.
Claim 9
Dependent Claim
17 words
The product of claim 5, wherein R represents an alkylene group having one to two carbon atoms.
Claim 10
Dependent Claim
21 words
The product of claim 6, wherein R is an alkylene group having one carbon atom, and Z is a 4,6-dichloro-1,3,5-triazinyl group.
References Cited (Backward Citations)
FR1226459A
Cited
US3961892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |