Patent US3198772A successfully refreshed from Google Patents.
US3198772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinyl monomers
Assignee: WR Grace and Co
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Filing: 1962-01-09
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Granted: 1965-08-03
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Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 Rajendra N Chadha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:20
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE PROCESS OF POLYMERIZING A MEMBER OF THE VINYL MONOMER GROUP CONSISTING OF VINYL ACETATE, VINYL BUTYRATE, VINYL PROPIONATE, VINYL OLEATE, VINYL-2-ETHYL HEXOATE, VINYL ISODECANOATE, METHYL METHACRYLATE, ETHYL METHACRYLATE, HEXYL METHACRYLATE, N-BUTYL METHACRYLATE, LAURYL METHACRYLATE, ETHYLENE GLYCOL DIMETHACRYLATE, METHYL ACRYLATE ETHYL ACRYLATE, 2-ETHYL HEXYL ACRYLATE, TRIDECYL ACRYLATE, ALLYL ACRYLATE, DI-N-BUTYL ITACONATE, ACRYLONITRILE, AND METHACRYLONITRILE IN TH PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF FREE OXYGEN AND AN ALUMINUM ALKYL COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
74 words
IN THE PROCESS OF POLYMERIZING A MEMBER OF THE VINYL MONOMER GROUP CONSISTING OF VINYL ACETATE, VINYL BUTYRATE, VINYL PROPIONATE, VINYL OLEATE, VINYL-2-ETHYL HEXOATE, VINYL ISODECANOATE, METHYL METHACRYLATE, ETHYL METHACRYLATE, HEXYL METHACRYLATE, N-BUTYL METHACRYLATE, LAURYL METHACRYLATE, ETHYLENE GLYCOL DIMETHACRYLATE, METHYL ACRYLATE ETHYL ACRYLATE, 2-ETHYL HEXYL ACRYLATE, TRIDECYL ACRYLATE, ALLYL ACRYLATE, DI-N-BUTYL ITACONATE, ACRYLONITRILE, AND METHACRYLONITRILE IN TH PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF FREE OXYGEN AND AN ALUMINUM ALKYL COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2129664A
Cited
US2868771A
Cited
US3047554A
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US2946778A
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US3117112A
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US3052661A
Cited
US3053822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |