US3192102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulping process
Assignee: Individual
•
Filing: 1962-08-15
•
Granted: 1965-06-29
•
Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 William J Nolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:08
CPC Classifications
D; D21; D21C; D21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A PROCESS FOR CONVERTING CHIPS OF A CELLULOSE FIBERBEARING MATERIAL, SUCH AS WOOD, INTO A PULP PRODUCT, WHICH CONSISTS OF THE STEPS: SUBDIVIDING GREEN CHIPS OF FIBER-BEARING MATERIALS HAVING A MOISTURE CONTENT OF FROM ABOUT 20% TO ABOUT 50% BY SHREDDING THE CHIPS ALONG THE GRAIN TO PRODUCE A SHREDDED PRODUCT CONSISTING OF PARTICLES OF WHICH (1) A SUBSTANTIAL PROPORTION HAVE AT LEAST ONE TRANSVERSE DIMENSION IN EXCESS OF ABOUT 1.65 MM. AND NO TRANSVERSE DIMENSION GREATER THAN ABOUT 6.7 MM., (2) NOT MORE THAN ABOUT 5% HAVE NO TRANSVERSE DIMENSIONS IN EXCESS OF ABOUT 1.65 MM., AND (3) AT LEAST 25% HAVE AT LEAST ONE TRANSVERSE DIMENSION IN EXCESS OF ABOUT 6.7 MM., THE LENGTHWISE DIMENSIONS OF THE CHIPS BEING SUBSTANTIALLY THE SAME AS THE ORIGINAL CHIPS; DIGESTING THE SHREDDED PRODUCT BY APPLYING THERETO A DIGESTING LIQUOR AND HEATING THE PARTICLES AND THE DIGESTING LIQUOR TO THE DIGESTING TEMPERATURE AS QUICKLY AS POSSIBLE AND HOLDING THE MIXTURE AT THE DIGESTING TEMPERATURE FOR THE PERIOD OF TIME REQUIRED TO PRODUCE A PULP OF THE DESIRED CHARACTERISTICS.
Claim 2
Dependent Claim
176 words
A PROCESS FOR CONVERTING CHIPS OF A CELLULOSE FIBERBEARING MATERIAL, SUCH AS WOOD, INTO A PULP PRODUCT, WHICH CONSISTS OF THE STEPS: SUBDIVIDING GREEN CHIPS OF FIBER-BEARING MATERIALS HAVING A MOISTURE CONTENT OF FROM ABOUT 20% TO ABOUT 50% BY SHREDDING THE CHIPS ALONG THE GRAIN TO PRODUCE A SHREDDED PRODUCT CONSISTING OF PARTICLES OF WHICH (1) A SUBSTANTIAL PROPORTION HAVE AT LEAST ONE TRANSVERSE DIMENSION IN EXCESS OF ABOUT 1.65 MM. AND NO TRANSVERSE DIMENSION GREATER THAN ABOUT 6.7 MM., (2) NOT MORE THAN ABOUT 5% HAVE NO TRANSVERSE DIMENSIONS IN EXCESS OF ABOUT 1.65 MM., AND (3) AT LEAST 25% HAVE AT LEAST ONE TRANSVERSE DIMENSION IN EXCESS OF ABOUT 6.7 MM., THE LENGTHWISE DIMENSIONS OF THE CHIPS BEING SUBSTANTIALLY THE SAME AS THE ORIGINAL CHIPS; DIGESTING THE SHREDDED PRODUCT BY APPLYING THERETO A DIGESTING LIQUOR AND HEATING THE PARTICLES AND THE DIGESTING LIQUOR TO THE DIGESTING TEMPERATURE AS QUICKLY AS POSSIBLE AND HOLDING THE MIXTURE AT THE DIGESTING TEMPERATURE FOR THE PERIOD OF TIME REQUIRED TO PRODUCE A PULP OF THE DESIRED CHARACTERISTICS.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |