US3247248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated monocarboxylic acids
Assignee: Cumberland Chemical Corp
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Filing: 1961-12-26
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Granted: 1966-04-19
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Victor A Sims
- 👤 James F Vitcha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:45
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/353; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A PROCESS WHICH COMPRISES REACTING FORMALDEHYDE AND AN ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID AND PROPIONIC ACID IN THE VAPOR PHASE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 300*C. TO ABOUT 500* C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF SODIM ALUMINOSILICATES, POTASSIUM ALUMINOSILICATES, RUBIDIUM ALUMINOSILICATES, MAGNESIUM ALUMINOSILICATES, CALCIUM ALUMINOSILICATES, STRONTIUM ALUMINOSILICATES, BARIUM ALUMINOSILICATES, MAGANESE ALUMINOSILICATES, COBALT ALUMINOSILICATES, ZINC 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 SILICA GEL, MOLYBDENUM OXIDE ON SILICA GEL, AND SILICA GEL, SAID ALKALI METAL HYDROXIDES BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND CESIUM HYDROXIDE, AND SAID ALKALINE EARTH METAL HYDROXIDES BEING SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE AND BARIUM HYDROXIDE, AND THE MOL RATIO OF ACID TO FORMALDEHYDE BEING FROM ABOUT 5:1 TO ABOUT 15:1, AND RECOVERING AN UNSATURATED MONOCARBOXYLIC ACID FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
172 words
A PROCESS WHICH COMPRISES REACTING FORMALDEHYDE AND AN ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID AND PROPIONIC ACID IN THE VAPOR PHASE AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 300*C. TO ABOUT 500* C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF SODIM ALUMINOSILICATES, POTASSIUM ALUMINOSILICATES, RUBIDIUM ALUMINOSILICATES, MAGNESIUM ALUMINOSILICATES, CALCIUM ALUMINOSILICATES, STRONTIUM ALUMINOSILICATES, BARIUM ALUMINOSILICATES, MAGANESE ALUMINOSILICATES, COBALT ALUMINOSILICATES, ZINC 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 SILICA GEL, MOLYBDENUM OXIDE ON SILICA GEL, AND SILICA GEL, SAID ALKALI METAL HYDROXIDES BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND CESIUM HYDROXIDE, AND SAID ALKALINE EARTH METAL HYDROXIDES BEING SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE AND BARIUM HYDROXIDE, AND THE MOL RATIO OF ACID TO FORMALDEHYDE BEING FROM ABOUT 5:1 TO ABOUT 15:1, AND RECOVERING AN UNSATURATED MONOCARBOXYLIC ACID FROM THE REACTION PRODUCTS.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |