US3966543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzyme-treated paper
Assignee: Baxter International Inc
•
Filing: 1972-10-30
•
Granted: 1976-06-29
•
Expires: 1992-10-30
Abstract
Abstract A dilute, aqueous solution of cellulase enzyme complex is applied to the wet paper web during paper manufacture to improve the disintegratability of the paper during subsequent disposal.
Inventors
- 👤 Theodore Cayle
- 👤 Gerard J. Moskowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:37
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/18; D21H21/20; D21H23/00; D21H23/02; D21H23/22; D21H23/24; D21H23/26; D21H23/28; D21H23/32; D21H23/42; D21H23/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A process for improving the disintegratability of moistened paper comprising applying a dilute aqueous solution of a cellulase enzyme complex containing at least about five units each of C 1 - and C x -components of enzyme activity per ml. of said solution to newly formed paper after leaving the forming section but prior to entering the drying section so that said paper contains from about 75% to about 80% water after said application, followed by drying in which the temperature of said paper is not raised above about 100°C, the amount of said complex being such as to provide at least about 50 C 1 units per gram of paper.
Claim 2
Dependent Claim
111 words
A process for improving the disintegratability of moistened paper comprising applying a dilute aqueous solution of a cellulase enzyme complex containing at least about five units each of C 1 - and C x -components of enzyme activity per ml. of said solution to newly formed paper after leaving the forming section but prior to entering the drying section so that said paper contains from about 75% to about 80% water after said application, followed by drying in which the temperature of said paper is not raised above about 100°C, the amount of said complex being such as to provide at least about 50 C 1 units per gram of paper.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the cellulase enzyme complex is obtained from Trichoderma viride.
Claim 4
Dependent Claim
16 words
The process of claim 2 in which the Trichoderma viride is the strain number QM 9123.
Claim 5
Dependent Claim
37 words
A cellulosic fiber paper in disposable form comprising cellulosic fibers and cellulase with latent enzymatic action, and the cellulase being present in sufficient amount to substantially enhance the disintegration of the paper when exposed to moist conditions.
Claim 6
Dependent Claim
37 words
A cellulosic fiber paper in disposable form comprising cellulosic fibers and cellulase with latent enzymatic action, and the cellulase being present in sufficient amount to substantially enhance the disintegration of the paper when exposed to moist conditions.
Claim 7
Dependent Claim
43 words
A process for producing a cellulosic fiber paper having improved disintegration properties when exposed to moist conditions, comprising the steps of impregnating the cellulosic fiber paper with cellulase and drying said impregnated paper to form a paper containing cellulase with latent enzymatic action.
Claim 8
Dependent Claim
43 words
A process for producing a cellulosic fiber paper having improved disintegration properties when exposed to moist conditions, comprising the steps of impregnating the cellulosic fiber paper with cellulase and drying said impregnated paper to form a paper containing cellulase with latent enzymatic action.
References Cited (Backward Citations)
CA758488A
Cited
US2280307A
Cited
US3021253A
Cited
US3041246A
Cited
US3642580A
Cited
US3645769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |