US2798060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerisation of acrylic esters with peroxide catalyst copper compound and a mercaptide
Assignee: Dental Fillings Ltd
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Filing: 1953-09-15
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Granted: 1957-07-02
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Expires: 1973-09-15
Abstract
No abstract record available.
Inventors
- 👤 Rawitzer Walter Louis
- 👤 Stern Harold Jacob
- 👤 Shadbolt Lawrence Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:42
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A RAPIDLY POLYMERISABLE COMPOSITION WHICH COMPRISES FORMING A MIXTURE OF LIQUID MONOMERIC METHYL METHACRYLATE AND A SOLID POLYMER COMPRISING PREDOMINANTLY METHYL METHACRYLATE UNITS IN PROPORTIONS TO FORM A COMPOSITION OF DOUGH-LIKE CONSISTENCY, THE SAID MIXTURE ALSO CONTAINING A PEROXIDE POLYMERISATION CATALYST, A COPPER COMPOUND, SELECTED FROM THE GROUP CONSISTING OF COPPER SALTS AND COPPER OXIDE, IN AN AMOUNT NOT EXCEEDING 600 PARTS PER MILLION, METHACRYLIC ACID AND A MERCAPTIDE SELECTED FROM THE GROUP OF THE ZINC, CADMIUM, LEAD, BISMUTH, ALKALI EARTH METAL AND ALKALI METAL SALTS FORMED WITH TERTIARY ALIPHATIC MERCAPTANS.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF A RAPIDLY POLYMERISABLE COMPOSITION WHICH COMPRISES FORMING A MIXTURE OF LIQUID MONOMERIC METHYL METHACRYLATE AND A SOLID POLYMER COMPRISING PREDOMINANTLY METHYL METHACRYLATE UNITS IN PROPORTIONS TO FORM A COMPOSITION OF DOUGH-LIKE CONSISTENCY, THE SAID MIXTURE ALSO CONTAINING A PEROXIDE POLYMERISATION CATALYST, A COPPER COMPOUND, SELECTED FROM THE GROUP CONSISTING OF COPPER SALTS AND COPPER OXIDE, IN AN AMOUNT NOT EXCEEDING 600 PARTS PER MILLION, METHACRYLIC ACID AND A MERCAPTIDE SELECTED FROM THE GROUP OF THE ZINC, CADMIUM, LEAD, BISMUTH, ALKALI EARTH METAL AND ALKALI METAL SALTS FORMED WITH TERTIARY ALIPHATIC MERCAPTANS.
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |