US3041246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzymatic conversion of cellulosic fibers
Assignee: HAMMERMILL MASSACHUSETTS PAPER
•
Filing: 1959-12-28
•
Granted: 1962-06-26
•
Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Bolaski Walter
- 👤 James C Gallatin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:16
CPC Classifications
D; D21; D21C; D21C5/00; D21C5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN THE PROCESS OF PREPARING A FINISHED PAPER SHEET, THE IMPROVEMENT COMPRISING, THE ALTERING OF THE PAPERMAKING FIBERS THROUGH THE FIBRILLATION THEREOF BY A PROCCESS WHICH COMPRISES TREATING THE FIBERS IN A BATH OF CELLULASE ENZYMES RANGING IN AMOUNT BETWEEN 0.01% AND 2.0% BY WEIGHT TO THE WEIGHT OF THE CELLULOSIC FIBERS TREATED AND MAINTAINED AT A TEMPERATURE BETWEEN 90*F. AND 100*F. IN A HYDROGEN ION CONCENTRATION CORRESPONDING TO A PH SUBSTANTIALLY AT 4.0 DURING AN ENZYMIC CONVERSION CYCLE NOT EXCEEDING 5 HOURS.
Claim 2
Dependent Claim
83 words
IN THE PROCESS OF PREPARING A FINISHED PAPER SHEET, THE IMPROVEMENT COMPRISING, THE ALTERING OF THE PAPERMAKING FIBERS THROUGH THE FIBRILLATION THEREOF BY A PROCCESS WHICH COMPRISES TREATING THE FIBERS IN A BATH OF CELLULASE ENZYMES RANGING IN AMOUNT BETWEEN 0.01% AND 2.0% BY WEIGHT TO THE WEIGHT OF THE CELLULOSIC FIBERS TREATED AND MAINTAINED AT A TEMPERATURE BETWEEN 90*F. AND 100*F. IN A HYDROGEN ION CONCENTRATION CORRESPONDING TO A PH SUBSTANTIALLY AT 4.0 DURING AN ENZYMIC CONVERSION CYCLE NOT EXCEEDING 5 HOURS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |