US3211683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing emulsions comprising a petroleum resin-maleic anhydride addition product and rosin
Assignee: Arakawa Rinsan Kagaku Kogyo KK
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Filing: 1960-03-08
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Granted: 1965-10-12
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Expires: 1980-03-08
Abstract
No abstract record available.
Inventors
- 👤 Arakawa Morimasa
- 👤 Hirooka Koichi
- 👤 Kosugi Takao
- 👤 Kawano Masaaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:11
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A SIZING AGENT FOR PAPER MAKING, CONSISTING ESSENTIALLY OF AN AQUEOUS EMULSIFIED PRODUCT WHICH IS AT LEAST PARTIALLY NEUTRALIZED AND IS CONSTITUTED BY A MIXTURE OF (1) A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ROSIN AND A,B-UNSATURATED DICARBOXYLIC ACID ADDITION PRODUCTS OF SAID ROSIN, AND (2) AN ADDITION PRODUCT OF PETROLEUM RESIN, THE LATTER PRODUCT BEING OBTAINED BY THE REACTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ANHYDRIDE, MALEIC ACID, FUMARIC ACID, AND ITACONIC ACID WITH PETROLEUM RESIN HAVING A SOFTENING POINT OF BETWEEN 30 AND 130*C., AN IODINE VALUE (WIJS METHOD) OF BETWEEN 30 AND 230 AND A SPECIFIC GRAVITY D15**15 OF BETWEEN 0.9 AND 1.2.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |