Patent US3197449A successfully refreshed from Google Patents.
US3197449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization process using a free-radical catalyst
Assignee: Union Carbide Corp
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Filing: 1960-07-27
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Granted: 1965-07-27
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Expires: 1980-07-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Reding
- 👤 Edgar W Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:07
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PRODUCING A SOLID COPOLYMER OF ETHYLENE AND AN ALPHA OLEFIN CONTAINING FROM 3 TO ABOUT 12 CARBON ATOMS, WHICH COMPRISES REACTING A MIXTURE CONSISTING OF ETHYLENE AND FROM ABOUT 3 TO ABOUT 40 MOLE PERCENT OF SAID ALPHA OLEFIN WITH A FREED RADICAL POLYMERIZATION CATALYST AT A PRESSURE OF FROM ABOUT 70,000 P.S.I.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PRODUCING A SOLID COPOLYMER OF ETHYLENE AND AN ALPHA OLEFIN CONTAINING FROM 3 TO ABOUT 12 CARBON ATOMS, WHICH COMPRISES REACTING A MIXTURE CONSISTING OF ETHYLENE AND FROM ABOUT 3 TO ABOUT 40 MOLE PERCENT OF SAID ALPHA OLEFIN WITH A FREED RADICAL POLYMERIZATION CATALYST AT A PRESSURE OF FROM ABOUT 70,000 P.S.I.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |