US3303154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions
Assignee: Mitsubishi Chemical Corp
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Filing: 1963-10-14
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Granted: 1967-02-07
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Expires: 1983-10-14
Abstract
No abstract record available.
Inventors
- 👤 Hirose Keisuki
- 👤 Hasegawa Masao
- 👤 Fujimaki Shinichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/18; C09D123/20; C09D123/22; C08; C08F; C08F214/00; C08F214/18; C08F214/26; C08F214/265; C09D123/04; C09D123/08; C09D127/00; C09D127/02; C09D127/12; C09D127/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A PROCESS OF PRODUCING A COPOLYMER DISPERSOID COMPOSITION OF TETRAFLUOROETHYLENE, ETHYLENE AND ISOBUTYLENE BY EMULSION POLYMERIZATION IN AN AQUEOUS MEDIUM COMPRISING REACTING AT A PRESSURE OF AT LEAST 30 ATMS. AND AT A TEMPERATURE OF 70-75%C. IN THE PRESENCE OF WATER A GASEOUS MIXTURE OF 20-80 MOL PERCENT TETRAFLUOROETHYLENE, 20-80 MOL PERCENT ETHYLENE AND 1-49 MOL PERCENT ISOBUTYLENE FOR A PERIOD OF SEVERAL HOURS UNTIL THE REACTION IS COMPLETE AND RECOVERING SAID COPOLYMER FROM THE REACTION VESSEL.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |