Patent US3775381A successfully refreshed from Google Patents.
US3775381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a modified petroleum resin for use in gravure ink
Assignee: Eneos Corp
•
Filing: 1971-12-29
•
Granted: 1973-11-27
•
Expires: 1991-12-29
Abstract
Abstract A PROCESS FOR PREPARING A MODIFIED PETROLEUM RESIN SUITABLE FOR GRAVURE INK MANUFACTURE WHICH COMPRISES BY POLYMERIZING A FRACTION BOILING IN THE TEMPERATURE RANGE OF FROM 140*C. TO 220*C. OBTAINED FROM THERMALLY CRACKED PETROLEUM DISTILLATES IN THE PRESENCE OF A FRIEDELCRAFTS TYPE CATALYST TO PRODUCE A RESIN WITH A REMARKABLY HIGH SOFTENING POINT, FOR EXAMPLE, AS HIGH AS 160*C., ADDING A PREDETERMINED AMOUNT OF AN UNSATURATED CARBOXYLIC ACID OR ITS ANHYDRDIDE TO THE POLYMERIZED RESIN THUS OBTAINED, AND FURTHER ESTERIFYING THE ACID ADDED RESIN WITH MONHYDRIC ALCOHOLS TO OBTAIN A RESIN HAVING A SOFTENING POINT ABOVE 145*C.
Inventors
- 👤 H Hayashi
- 👤 H Sato
- 👤 Y Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:43
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/106; C09D11/108; C08; C08F; C08F8/00; C08F8/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |