US3557040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a carbon black-synthetic resin composition
Assignee: Japan Gas Chemical Co Inc
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Filing: 1967-08-14
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Granted: 1971-01-19
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Expires: 1987-08-14
Abstract
Abstract A PROCESS FOR PREPARING A CARBON BLACK-SYNTHETIC RESIN COMPOSITION WHICH COMPRISES CONTACTING AT LEAST ONE KIND OF A,B-ETHYLENICALLY UNSATURATED MONOMER POLYMERIZABLE WITH FREE RADICALS WITH A POLYMERIZATION INITIATOR IN THE PRESENCE OF CARBON BLACK, CHARACTERIZED IN THAT SAID INITIATOR IS ADDED IN AT LEAST 2 DIVIDED TIMES, NAMELY, ONCE PRIOR TO THE INITIATION OF THE POLYMERIZATION, AND NEXT AFTER FLUIDITY OF THE REACTION MIXTURE INCREASE, AND A NON-THIXOTROPIC CARBON BLACK DISPERSION OBTAINED BY THE AFOREMENTIONED PROCESS.
Inventors
- 👤 Naomitsu Takashina
- 👤 Tetuo Aida
- 👤 Wakio Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:10
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/44
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |