Patent US2348494A successfully refreshed from Google Patents.
US2650239A
Expired / Lapsed
US
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Preparation of chromic salts
Assignee: ExxonMobil Oil Corp
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Filing: 1952-04-18
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Granted: 1953-08-25
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Expires: 1972-04-18
Abstract
No abstract record available.
Inventors
- 👤 William A Stover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:41
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR PREPARING THE CHROMIC SALT OF A LOW MOLECULAR WEIGHT FATTY ACID, WHICH COMPRISES REDUCING CR+6 TO CR+3, IN A REACTION MIXTURE CONTAINING NOT MORE THAN ABOUT 10 PER CENT BY WEIGHT OF WATER, WITH GLYCOLIC ACID IN THE PRESENCE OF A MONOBASIC FATTY ACID HAVING NOT MORE THAN 6 CARBON ATOMS.
Claim 2
Dependent Claim
54 words
A PROCESS FOR PREPARING THE CHROMIC SALT OF A LOW MOLECULAR WEIGHT FATTY ACID, WHICH COMPRISES REDUCING CR+6 TO CR+3, IN A REACTION MIXTURE CONTAINING NOT MORE THAN ABOUT 10 PER CENT BY WEIGHT OF WATER, WITH GLYCOLIC ACID IN THE PRESENCE OF A MONOBASIC FATTY ACID HAVING NOT MORE THAN 6 CARBON ATOMS.
References Cited (Backward Citations)
US2428356A
Cited
US2615031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |