Patent US2540287A successfully refreshed from Google Patents.
US3255168A
Expired / Lapsed
US
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Process for polymerizing or copolymerizing ethylenically unsaturated compounds using a complex organic boron compound as a catalyst
Assignee: Edison SpA
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Filing: 1961-11-06
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Granted: 1966-06-07
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Borsini Giancarlo
- 👤 Peron Umberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PROCESS FOR POLYMERIZING A MONOMER HAVING A DOUBLE-BOND ETHYLENIC LINKAGE, OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A PROCESS FOR POLYMERIZING A MONOMER HAVING A DOUBLE-BOND ETHYLENIC LINKAGE, OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2112298A
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US2566382A
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US2566184A
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US2765296A
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US2840551A
Cited
US2989516A
Cited
US2950306A
Cited
US3057843A
Cited
US3004017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |