Patent US3930933A successfully refreshed from Google Patents.
US3930933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Debonded cellulose fiber pulp sheet and method for producing same
Assignee: POPE & TALBOT WIS Inc A CORP OF
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Filing: 1970-11-25
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Granted: 1976-01-06
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Expires: 1990-11-25
Abstract
Abstract A debonded cellulose fiber pulp sheet that is adapted to be fiberized by mechanical action to form a fluffy material and is impregnated with small amounts, such as 1% or less, of a long chain fatty alkyl cationic compound having at least 12 carbon atoms in at least one alkyl chain and a similar small or somewhat larger amount of an oily material such as a mineral, vegetable or animal oil which coacts with the cationic compound to render the pulp sheet easily mechanically fiberizable, and the resulting fiberized fluffy material softer, more lofty and more absorbent and method for producing said sheet.
Inventors
- 👤 Donald K. George
- 👤 Joseph H. Angel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:21
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/001; D21C9/002; D21C9/005; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A debonded cellulose fiber pulp sheet that is adapted to be fiberized easily by mechanical action to form a fluffy, lofty and absorbent fibrous material, said sheet being impregnated with an admixture of a long chain fatty alkyl cationic compound having at least 12 carbon atoms in at least one alkyl chain, and a natural non-drying oil which has no adverse effect on the pulp and which per se does not effect debonding of the fibers but coacts with the cationic compound to effect debonding of the fibers of the pulp sheet and thereby render it easily fiberizable.
Claim 2
Dependent Claim
98 words
A debonded cellulose fiber pulp sheet that is adapted to be fiberized easily by mechanical action to form a fluffy, lofty and absorbent fibrous material, said sheet being impregnated with an admixture of a long chain fatty alkyl cationic compound having at least 12 carbon atoms in at least one alkyl chain, and a natural non-drying oil which has no adverse effect on the pulp and which per se does not effect debonding of the fibers but coacts with the cationic compound to effect debonding of the fibers of the pulp sheet and thereby render it easily fiberizable.
Claim 3
Dependent Claim
41 words
A debonded cellulose fiber pulp sheet as defined in claim 1 and in which the amount of cationic compound is less than 1% and the oil is in an amount greater than 1% of the dry weight of the pulp sheet.
Claim 4
Dependent Claim
24 words
A debonded cellulose fiber sheet as defined in claim 1 and in which the cationic compound is a long chain fatty quaternary ammonium compound.
Claim 5
Dependent Claim
22 words
A debonded cellulose fiber pulp sheet as defined in claim 1 and in which the oil is a natural non-drying mineral oil.
Claim 6
Independent Claim
93 words
A method of producing an easily fiberizable pulp sheet comprising introducing into the pulp before the sheet is dried, an admixture of a long chain fatty alkyl cationic compound having at least 12 carbon atoms in at least one alkyl chain, and a natural non-drying oil which has no adverse effect on the pulp and which per se does not effect debonding of the fibers but coacts with the cationic compound to effect debonding of the fibers of the pulp sheet and thereby render it easily fiberizable, and then drying the pulp sheet.
Claim 7
Independent Claim
93 words
A method of producing an easily fiberizable pulp sheet comprising introducing into the pulp before the sheet is dried, an admixture of a long chain fatty alkyl cationic compound having at least 12 carbon atoms in at least one alkyl chain, and a natural non-drying oil which has no adverse effect on the pulp and which per se does not effect debonding of the fibers but coacts with the cationic compound to effect debonding of the fibers of the pulp sheet and thereby render it easily fiberizable, and then drying the pulp sheet.
Claim 8
Dependent Claim
36 words
A method of producing an easily fiberizable pulp sheet as defined in claim 5 and in which the admixture of the cationic compound and oil is introduced into the pulp slurry before formation of the sheet.
Claim 9
Dependent Claim
36 words
A method of producing an easily fiberizable pulp sheet as defined in claim 5 and in which the admixture of cationic compound and oil is introduced into the preformed wet pulp sheet before it is dried.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |