Patent US3271240A successfully refreshed from Google Patents.
US3271240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of sizing water-laid sheets with a cationic asphalt emulsion
Assignee: Chevron USA Inc
•
Filing: 1962-11-20
•
Granted: 1966-09-06
•
Expires: 1982-11-20
Abstract
No abstract record available.
Inventors
- 👤 William J Kari
- 👤 Ernest M Lorenzini
- 👤 Lloyd C Wingerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:22
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE MANUFACTURE OF SIZED SHEETS OF PAPER AND BOARD FROM A CELLULOSIC FIBROUS MATERIAL, SAID PROCESS CONSISTING ESSENTIALLY OF THE STEPS OF FORMING AN AQUEOUS PULP OF SAID FIBROUS MATERIAL OF A CONSISTENCY FROM ABOUT 0.1 TO ABOUT 6.0% OF FIBROUS SOLIDS AND THOROUGHLY INTERMIXING WITH AND THROUGHOUT SAID AQUEOUS PULP A CATIONIC OIL-IN-WATER TYPE EMULSION OF ASPHALT CHARACTERIZED BY A PENETRATION OF FROM ABOUT 0 TO ABOUT 30 AT 77*F. (ASTM D5-52) AND A SOFTENING POINT OF ABOUT 170 TO ABOUT 260*F. (ASTM D36-26), SAID ASPHALT BEING EMULSIFIED IN WATER WITH THE AID OF AN OILSOLUBLE, CATION-ACTIVE, EMULSIFYING SALT OF AN ALKYLENE DIAMINE OF THE GENERAL FORMULA RNHR''NH2 WHEREIN R IS AN ACYCLIC HYDROCARBON GROUP OF FROM 8 TO 20 CARBON ATOMS AND R'' IS AN ALKYLENE GROUP OF FROM 2 TO 3 CARBON ATOMS.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE MANUFACTURE OF SIZED SHEETS OF PAPER AND BOARD FROM A CELLULOSIC FIBROUS MATERIAL, SAID PROCESS CONSISTING ESSENTIALLY OF THE STEPS OF FORMING AN AQUEOUS PULP OF SAID FIBROUS MATERIAL OF A CONSISTENCY FROM ABOUT 0.1 TO ABOUT 6.0% OF FIBROUS SOLIDS AND THOROUGHLY INTERMIXING WITH AND THROUGHOUT SAID AQUEOUS PULP A CATIONIC OIL-IN-WATER TYPE EMULSION OF ASPHALT CHARACTERIZED BY A PENETRATION OF FROM ABOUT 0 TO ABOUT 30 AT 77*F. (ASTM D5-52) AND A SOFTENING POINT OF ABOUT 170 TO ABOUT 260*F. (ASTM D36-26), SAID ASPHALT BEING EMULSIFIED IN WATER WITH THE AID OF AN OILSOLUBLE, CATION-ACTIVE, EMULSIFYING SALT OF AN ALKYLENE DIAMINE OF THE GENERAL FORMULA RNHR''NH2 WHEREIN R IS AN ACYCLIC HYDROCARBON GROUP OF FROM 8 TO 20 CARBON ATOMS AND R'' IS AN ALKYLENE GROUP OF FROM 2 TO 3 CARBON ATOMS.
References Cited (Backward Citations)
US2601597A
Cited
US2694633A
Cited
US2954313A
Cited
US3036015A
Cited
US2919204A
Cited
US3026266A
Cited
US3096190A
Cited
US3126292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |