Patent US3438997A successfully refreshed from Google Patents.
US3438997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyol synthesis using formaldehyde and olefins
Assignee: Shell USA Inc
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Filing: 1966-05-11
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Granted: 1969-04-15
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Expires: 1986-05-11
Abstract
No abstract record available.
Inventors
- 👤 Lloyd C Fetterly
- 👤 George W Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:17
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/06; B; B01; B01J; B01J31/00; B01J31/02; B01J31/06; B01J31/08; B01J31/10; C07C; C07C67/00; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12; B01J2231/00; B01J2231/30; B01J2231/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
THE CONTINUOUS ROCESS FOR THE PRODUCTIN OF GLYCOLS BY CONTACTING IN THE VAPOR PHASE AN ALKENE HAVING UP TO 8 CARBON ATOMS WITH FORMALDEHYDE, THE MOLAR RATIO OF FORMALDEHYDE TO SAID ALKENE BEING FROM ABOUT 1:5 TO ABOUT 10:1, IN A NORMALLY LIQUID POLAR MONOHYDROXYLIC REACTION DILUENT SELECTED FRO THE GROU CONSISTIN GOF WATER, ALKANOIC ACIDS HAVING UP TO 4 CARBON ATOMS AND ALKANOLS HAVING UP TO 4 CABON ATOMS, IN THE PRESENCE OF AN ACIDIC CATIONIC EXHANGE RESIN CATALYST AT A TEMPERATURE FROM ABOUT 0*C. TO ABOUT 250*C. FOR A CONTACT TIME OF LESS THAN TWO MINUTES, AND HYDROLYZING THE RESULTING OXYGEN-CONTAINING REACTION PRODUCT TO THE GLYCOL.
Claim 2
Dependent Claim
108 words
THE CONTINUOUS ROCESS FOR THE PRODUCTIN OF GLYCOLS BY CONTACTING IN THE VAPOR PHASE AN ALKENE HAVING UP TO 8 CARBON ATOMS WITH FORMALDEHYDE, THE MOLAR RATIO OF FORMALDEHYDE TO SAID ALKENE BEING FROM ABOUT 1:5 TO ABOUT 10:1, IN A NORMALLY LIQUID POLAR MONOHYDROXYLIC REACTION DILUENT SELECTED FRO THE GROU CONSISTIN GOF WATER, ALKANOIC ACIDS HAVING UP TO 4 CARBON ATOMS AND ALKANOLS HAVING UP TO 4 CABON ATOMS, IN THE PRESENCE OF AN ACIDIC CATIONIC EXHANGE RESIN CATALYST AT A TEMPERATURE FROM ABOUT 0*C. TO ABOUT 250*C. FOR A CONTACT TIME OF LESS THAN TWO MINUTES, AND HYDROLYZING THE RESULTING OXYGEN-CONTAINING REACTION PRODUCT TO THE GLYCOL.
Claim 3
Dependent Claim
114 words
THE CONTINUOUS PROCESS FOR THE PRODUCTION OF A MATERIAL SELECTED FRO THE GROUP CONSISTING OF GLYCOLS, ESTERS THEREOF, AND ETHERS THEREOF WHICH COMPRISES CONTACTING IN THE VAPOR PHASE AN ALKENE HAVING UP TO 8 CARBON ATOMS WITH FORMALDEHYDE, THE MOLAR RATIO OF FORMALDEHYDE TO SAID ALKENE BEING FROM ABOUT 1:5 TO ABOUT 10:1, IN A NORMALLY LIQUID POLAR MONOHYDROXYLIC REACTION DILUENT SELECTED FROM THE GROUP CONSISTING OF WATER, ALKANOIC ACIDS HAVING UP TO 4 CARBON ATOM S AND ALKANOLS HAVING UP TO 4 CARBON ATOMS, IN THE PRESENCE OF AN ACIDIC CATIONIC EXCHANGE RESIN CATALYST AT A TEMPERATURE FROM ABOUT 0* C. TO ABOUT 250*C. FOR A CONTACT TIME OF LESS THAN TWO MINUTES.
Claim 4
Dependent Claim
114 words
THE CONTINUOUS PROCESS FOR THE PRODUCTION OF A MATERIAL SELECTED FRO THE GROUP CONSISTING OF GLYCOLS, ESTERS THEREOF, AND ETHERS THEREOF WHICH COMPRISES CONTACTING IN THE VAPOR PHASE AN ALKENE HAVING UP TO 8 CARBON ATOMS WITH FORMALDEHYDE, THE MOLAR RATIO OF FORMALDEHYDE TO SAID ALKENE BEING FROM ABOUT 1:5 TO ABOUT 10:1, IN A NORMALLY LIQUID POLAR MONOHYDROXYLIC REACTION DILUENT SELECTED FROM THE GROUP CONSISTING OF WATER, ALKANOIC ACIDS HAVING UP TO 4 CARBON ATOM S AND ALKANOLS HAVING UP TO 4 CARBON ATOMS, IN THE PRESENCE OF AN ACIDIC CATIONIC EXCHANGE RESIN CATALYST AT A TEMPERATURE FROM ABOUT 0* C. TO ABOUT 250*C. FOR A CONTACT TIME OF LESS THAN TWO MINUTES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |