Patent US2500203A successfully refreshed from Google Patents.
US2500203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants
Assignee: ExxonMobil Oil Corp
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Filing: 1949-05-11
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Granted: 1950-03-14
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 Orland M Reiff
- 👤 Jr Harry J Andress
- 👤 Alfred P Kozacik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:09
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/14; C10M2207/142; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF PREPARATION OF A VISCOUS OIL HAVING A LOW POUR POINT AND A LOW CLOUD POINT, WHICH COMPRISES: HEATING A CHARGE CONSISTING ESSENTIALLY OF A MONO-OLEFIN HAVING BETWEEN ABOUT EIGHT AND ABOUT EIGHTEEN CARBON ATOMS PER MOLECULE AND A VINYL AROMATIC COMPOUND, IN THE PRESENCE OF A CATALYST COMPRISING AN ASSOCIATION OF SILICA AND AN AMPHOTERIC METAL OXIDE, AT A TEMPERATURE BETWEEN ABOUT 300*F. AND ABOUT 600* F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT CONDENSATION OF SAID MONO-OLEFIN AND SAID VINYL AROMATIC COMPOUND, THE CHARGE CONTAINING FROM ABOUT ONE TO ABOUT TWO MOLAR PROPORTIONS OF SAID MONO-OLEFIN PER MOLAR PROPORTION OF SAID VINYL AROMATIC COMPOUND.
Claim 2
Independent Claim
109 words
THE METHOD OF PREPARATION OF A VISCOUS OIL HAVING A LOW POUR POINT AND A LOW CLOUD POINT, WHICH COMPRISES: HEATING A CHARGE CONSISTING ESSENTIALLY OF A MONO-OLEFIN HAVING BETWEEN ABOUT EIGHT AND ABOUT EIGHTEEN CARBON ATOMS PER MOLECULE AND A VINYL AROMATIC COMPOUND, IN THE PRESENCE OF A CATALYST COMPRISING AN ASSOCIATION OF SILICA AND AN AMPHOTERIC METAL OXIDE, AT A TEMPERATURE BETWEEN ABOUT 300*F. AND ABOUT 600* F. FOR A PERIOD OF TIME SUFFICIENT TO EFFECT CONDENSATION OF SAID MONO-OLEFIN AND SAID VINYL AROMATIC COMPOUND, THE CHARGE CONTAINING FROM ABOUT ONE TO ABOUT TWO MOLAR PROPORTIONS OF SAID MONO-OLEFIN PER MOLAR PROPORTION OF SAID VINYL AROMATIC COMPOUND.
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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |