Patent CH308958A successfully refreshed from Google Patents.
US2803672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of glycols prepared by hydroxylation of cracked wax olefins
Assignee: California Research LLC
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Filing: 1953-03-23
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Granted: 1957-08-20
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Sargent Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:16
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR PRODUCING IMPROVED GLYCOLS FROM CRUDE GLYCOLS PREPARED BY THE HYDROXYLATION OF HIGH MOLECULAR WEIGHT CRACKED PETROLEUM WAX OLEFINS HAVING 8 TO 24 CARBON ATOMS IN THE MOLECULE, WHICH COMPRISES DISSOLVING 93 TO 99% BY WEIGHT OF THE CRUDE GLYCOLS ON AN OIL-FREE BASIS IN A HYDROCARBON LIQUID BOILING BELOW ABOUT 150*C., SEPARATING THE UNDISSOLVED PORTION OF THE CRUDE GLYCOLS FROM THE SOLUTION AND RECOVERING THE DESIRED GLYCOLS FROM THE SOLUTION.
Claim 2
Dependent Claim
73 words
A PROCESS FOR PRODUCING IMPROVED GLYCOLS FROM CRUDE GLYCOLS PREPARED BY THE HYDROXYLATION OF HIGH MOLECULAR WEIGHT CRACKED PETROLEUM WAX OLEFINS HAVING 8 TO 24 CARBON ATOMS IN THE MOLECULE, WHICH COMPRISES DISSOLVING 93 TO 99% BY WEIGHT OF THE CRUDE GLYCOLS ON AN OIL-FREE BASIS IN A HYDROCARBON LIQUID BOILING BELOW ABOUT 150*C., SEPARATING THE UNDISSOLVED PORTION OF THE CRUDE GLYCOLS FROM THE SOLUTION AND RECOVERING THE DESIRED GLYCOLS FROM THE SOLUTION.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |