Patent US3205179A successfully refreshed from Google Patents.
US3205179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the activation of dehydrogenation catalysts
Assignee: Dow Chemical Co
•
Filing: 1961-07-14
•
Granted: 1965-09-07
•
Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Soderquist
- 👤 James L Amos
- 👤 Harold D Boyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:20
CPC Classifications
B; B01; B01J; B01J21/00; B01J37/00; B01J37/0009; C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A PROCESS FOR ACTIVATION OF SELF-REGENERATIVE CATALYST COMPOSITIONS CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A METAL OXIDE OF THE GROUP OF IRON, MAGNESIUM AND ZINC OXIDES AND MIXTURES OF THE FOREGOING, AND A MINOR PROPORTION OF AT LEASST ONE OTHER CONSITUENT WHICH IS AN ALKALI PROMOTOR, WHICH METHOD COMPRISES THE STEPS OF INCORPORATING INTO THE ABOVE ACTIVE CATALYST COMPOSITION FROM ABOUT 1 UP TO ABOUT 25 PERCENT BY WEIGHT OF THE CATALYST COMPOSITION OF A CARBONACEOUS MATERIAL CONSISTING ESSENTIALLY OF CARBON; HEATING THE CATALYST COMPOSITION CONTAINING THE CARBONACEOUS MATERIAL AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 200*C. UP TO ABOUT 650*C. WITH THE SIMULTANEOUS SUBJECTION THEREOF TO AN ATMOSPHERE CONTAINING AT LEAST A MAJOR PROPORTION BY WEIGHT OF STEAM FOR A PERIOD OF TIME OF AT LEAST ABOUT 30 MINUTES AND THEREAFTER ROASTING THE CATALYSST COMPOSITION IN THE PRESENCE OF THE ATMOSPHERE AUTOGENEOUSLY GENERATED AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 800* TO ABOUT 980*C. FOR A PERIOD OF TIME FROM ABOUT 2 TO ABOUT 24 HOURS.
Claim 2
Dependent Claim
170 words
A PROCESS FOR ACTIVATION OF SELF-REGENERATIVE CATALYST COMPOSITIONS CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF A METAL OXIDE OF THE GROUP OF IRON, MAGNESIUM AND ZINC OXIDES AND MIXTURES OF THE FOREGOING, AND A MINOR PROPORTION OF AT LEASST ONE OTHER CONSITUENT WHICH IS AN ALKALI PROMOTOR, WHICH METHOD COMPRISES THE STEPS OF INCORPORATING INTO THE ABOVE ACTIVE CATALYST COMPOSITION FROM ABOUT 1 UP TO ABOUT 25 PERCENT BY WEIGHT OF THE CATALYST COMPOSITION OF A CARBONACEOUS MATERIAL CONSISTING ESSENTIALLY OF CARBON; HEATING THE CATALYST COMPOSITION CONTAINING THE CARBONACEOUS MATERIAL AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 200*C. UP TO ABOUT 650*C. WITH THE SIMULTANEOUS SUBJECTION THEREOF TO AN ATMOSPHERE CONTAINING AT LEAST A MAJOR PROPORTION BY WEIGHT OF STEAM FOR A PERIOD OF TIME OF AT LEAST ABOUT 30 MINUTES AND THEREAFTER ROASTING THE CATALYSST COMPOSITION IN THE PRESENCE OF THE ATMOSPHERE AUTOGENEOUSLY GENERATED AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 800* TO ABOUT 980*C. FOR A PERIOD OF TIME FROM ABOUT 2 TO ABOUT 24 HOURS.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |