US3279975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surface sizing paper with a reaction product of an unsaturated acid and a petroleum resin
Assignee: Individual
•
Filing: 1964-04-29
•
Granted: 1966-10-18
•
Expires: 1984-04-29
Abstract
No abstract record available.
Inventors
- 👤 Yoshii Ten
- 👤 Yoshioka Shigehiko
- 👤 Tabuchi Keizaburo
- 👤 Yamada Hideto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:49
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; C; C08; C08F; C08F8/00; C08F8/44; C08F222/00; C08F222/04; C08F222/06; C08F240/00; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A SIZING METHOD COMPRISING ADDING ALUM TO PULP SLURRY IN AN AMOUNT OF 1 TO 5% BASED ON DRY PULP WEIGHT AND MAKING THE PULP INTO A WEB OF PAPER, AND APPLYING TO THE SURFACE OF THE PAPER A SAPONIFIED PETROLEUM RESIN SIZE OF THE CHARACTER WHICH IS OBTAINED FROM REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHABETA UNSATURATED POLYBASIC ACIDS AND THEIR ANHYDRIDES IN THE PRESENCE OF FRIEDEL-CRAFTS CATALYST, WITH A HARD, THERMOPLASTIC RESIN RESULTING FROM A COPOLYMERIZATION OF LIQUID HYDROCARBONS OF 5-10 CAFBON ATOMS HAVING A BROMINE NUMBER OF 10-70 AND A SOFTENING POINT OF 40*-130*C., SAID SIZE BEING IN THE FORM OF A DISPERSED SOLUTION OF PARTICLES HAVING AN AVERAGE PARTICLE DIAMETER OF LESS THAN 1,00 ANGSTROMS AND THE ADDITION OF ALUM PROVIDING AN ACIDIC CONDITION WHICH DEVELOPS THE SIZING PROPERTY OF THE RESIN IN THE PAPER.
Claim 2
Dependent Claim
142 words
A SIZING METHOD COMPRISING ADDING ALUM TO PULP SLURRY IN AN AMOUNT OF 1 TO 5% BASED ON DRY PULP WEIGHT AND MAKING THE PULP INTO A WEB OF PAPER, AND APPLYING TO THE SURFACE OF THE PAPER A SAPONIFIED PETROLEUM RESIN SIZE OF THE CHARACTER WHICH IS OBTAINED FROM REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALPHABETA UNSATURATED POLYBASIC ACIDS AND THEIR ANHYDRIDES IN THE PRESENCE OF FRIEDEL-CRAFTS CATALYST, WITH A HARD, THERMOPLASTIC RESIN RESULTING FROM A COPOLYMERIZATION OF LIQUID HYDROCARBONS OF 5-10 CAFBON ATOMS HAVING A BROMINE NUMBER OF 10-70 AND A SOFTENING POINT OF 40*-130*C., SAID SIZE BEING IN THE FORM OF A DISPERSED SOLUTION OF PARTICLES HAVING AN AVERAGE PARTICLE DIAMETER OF LESS THAN 1,00 ANGSTROMS AND THE ADDITION OF ALUM PROVIDING AN ACIDIC CONDITION WHICH DEVELOPS THE SIZING PROPERTY OF THE RESIN IN THE PAPER.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |