US2998416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ylide-transition metal compound catalyst system, process of making and method of using
Assignee: Cities Service Research and Development Co
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Filing: 1960-06-23
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Granted: 1961-08-29
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Mendel Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:21
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A PROCESS FOR PRODUCING POLYMERS WHICH COMPRISES SUBJECTING A MONOMER CONTAINING AN ACTIVE VINYL GROUP TO THE INFLUENCE OF A CATALYST WHICH IS THE PRODUCT OF THE INTERACTION OF (1) A TRANSITION METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE HALIDES, SUBHALIDES, OXYHALIDES, COMPLEX HALIDES, ESTERS, CYCLOPENTADIENYL CHELATES OF BETA KETONES, SALTS OF ORGANIC ACIDS, AND OXIDES OF SCANDIUM, TITANIUM, VANADIUM, CHROMIUM, MANGANESE, COBALT, NICKEL, YTRIUM, ZIRCONIUM, NIOBIUM, MOLYBDENIUM, URANIUM, THORIUM, SELENIUM, TECHNETIUM, RUTHENIUM, TELLURIUM, RHODIUM, PALLADIUM, LANTHANUM, LUTETIUM, HAFNIUM, TANTALUM, WOLFRAM, RHENIUM, OSMIUM, IRIDUIMM PLATINUM AND ACTINUM AND (2) AN YLIDE OF THE FORMULA
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |