Patent US3030349A successfully refreshed from Google Patents.
US3030349A
Expired / Lapsed
US
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Methacrylic ester polymerization
Assignee: WR Grace and Co
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Filing: 1960-05-06
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Granted: 1962-04-17
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Expires: 1980-05-06
Abstract
No abstract record available.
Inventors
- 👤 Palmer B Stickney
- 👤 Overhults Wendell
- 👤 Frank X Werber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:20
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE PROCESS OF POLYMERIZING A MEMBER OF THE MONOMER GROUP CONSISTING OF METHYACRYLATE AND ETHYLENE DIMETHYACRYLATE WHICH COMPRISES SUBJECTING THE GROUP MEMBER TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF ALUMINUM TRIETHYL IN COMBINATION WITH CATALYST ACTIVATORS CONSISTING ESSENTIALLY OF TRI-N-BUTYL AMINE AND AN ANHYDROUS TRIVALENT CHLORIDE OF A MEMBER OF THE GROUP CONSISTING OF SAMARIUM AND YTTERBIUM.
Claim 2
Dependent Claim
59 words
THE PROCESS OF POLYMERIZING A MEMBER OF THE MONOMER GROUP CONSISTING OF METHYACRYLATE AND ETHYLENE DIMETHYACRYLATE WHICH COMPRISES SUBJECTING THE GROUP MEMBER TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF ALUMINUM TRIETHYL IN COMBINATION WITH CATALYST ACTIVATORS CONSISTING ESSENTIALLY OF TRI-N-BUTYL AMINE AND AN ANHYDROUS TRIVALENT CHLORIDE OF A MEMBER OF THE GROUP CONSISTING OF SAMARIUM AND YTTERBIUM.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |