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US3100795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of methyl methacrylate
Assignee: Airco Inc
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Filing: 1961-12-26
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Granted: 1963-08-13
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Russell K Frantz
- 👤 James F Vitcha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:18
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS WHICH COMPRISES PREPARING A VAPOR PHASE MIXTURE OF METHANOL, PROPOINOIC ACID, AND FORMALDEHYDE; PASSING SAID VAPOR PHASE MIXTURE OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALUMINOSILICATES, ALKALINE EARTH METAL ALUMINOSILICATES, ALKALI METAL HYDROXIDES ON ALUMINOSILICATES, ALKALINE EARTH METAL HYDROXIDES ON ALUMINOSILICATES, ALKALI METAL HYDROXIDES ON SILICA GEL, ALKALINE EARTH METAL HYDROXIDES ON SILICA GEL, SODIUM SILICATE ON SILICA GEL, POTASSIUM SILICATE ON SILIA GEL, MOLBDENUM OXIDE ON SILICA GEL, MANGANESE ALUMINOSILICATE, COBALT ALUMINOSILICATE, AND ZINC ALUMINOSILICATE; AND RECOVERING ,ETHYL METHACRYLATE FROM AND REACTION PRODUCTS.
Claim 2
Dependent Claim
90 words
A PROCESS WHICH COMPRISES PREPARING A VAPOR PHASE MIXTURE OF METHANOL, PROPOINOIC ACID, AND FORMALDEHYDE; PASSING SAID VAPOR PHASE MIXTURE OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALUMINOSILICATES, ALKALINE EARTH METAL ALUMINOSILICATES, ALKALI METAL HYDROXIDES ON ALUMINOSILICATES, ALKALINE EARTH METAL HYDROXIDES ON ALUMINOSILICATES, ALKALI METAL HYDROXIDES ON SILICA GEL, ALKALINE EARTH METAL HYDROXIDES ON SILICA GEL, SODIUM SILICATE ON SILICA GEL, POTASSIUM SILICATE ON SILIA GEL, MOLBDENUM OXIDE ON SILICA GEL, MANGANESE ALUMINOSILICATE, COBALT ALUMINOSILICATE, AND ZINC ALUMINOSILICATE; AND RECOVERING ,ETHYL METHACRYLATE FROM AND REACTION PRODUCTS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |