US2960539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of antiozonants from wood tar distillate
Assignee: Universal Oil Products Co
•
Filing: 1957-10-18
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Granted: 1960-11-15
•
Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Rosenwald
- 👤 William K T Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:58
CPC Classifications
C; C08; C08K; C08K11/00; C08L; C08L21/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PRODUCTING A NONISTAINING NTIOZONANT FROM WOOD TAR DISTILLATE CONTAINING 2,6-DIMETHOXY-4-ALKYLPHENOLS, 5-ALKYLPYROGALLOLS AND MONOMETHYL ETHERS OF 5-ALKYLPYROGALLOLS, WHICH COMPRISES SUBJECTING SAID DISTILLATE TO THE ACTION OF ALKYLENE OXIDE OXIDE AT TEMPERATURE OF FROM ABOUT 50*C. TO ABOUT 300*C AND SELECTIVELY REACTING THE ALKYSENE OXIDE WITH SAID PYROGALLOL COMPOUNDS WITHOUT CONVERSION OF SAID 2,6-DIMETHOXY-4ALKYLPHENOLS, THE AMOUNT OF ALKYLENE OXIDE BEING SUCH AS TO CONVERT 5-ALKYLPYROGALLOLS TO 2,6-DI(HYDROXYALKOXY)-4-ALKYLPHENOLS AND TO CONVERT MONOMETHYL ETHERS OF 5-ALKYLPYROGALLOLS TO 2-METHOXY-4-ALKYL-6-(HYDROXYALKYXY)-PHENOL,AND RECOVERING THE THUS TREATED DISTILLATE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PRODUCTING A NONISTAINING NTIOZONANT FROM WOOD TAR DISTILLATE CONTAINING 2,6-DIMETHOXY-4-ALKYLPHENOLS, 5-ALKYLPYROGALLOLS AND MONOMETHYL ETHERS OF 5-ALKYLPYROGALLOLS, WHICH COMPRISES SUBJECTING SAID DISTILLATE TO THE ACTION OF ALKYLENE OXIDE OXIDE AT TEMPERATURE OF FROM ABOUT 50*C. TO ABOUT 300*C AND SELECTIVELY REACTING THE ALKYSENE OXIDE WITH SAID PYROGALLOL COMPOUNDS WITHOUT CONVERSION OF SAID 2,6-DIMETHOXY-4ALKYLPHENOLS, THE AMOUNT OF ALKYLENE OXIDE BEING SUCH AS TO CONVERT 5-ALKYLPYROGALLOLS TO 2,6-DI(HYDROXYALKOXY)-4-ALKYLPHENOLS AND TO CONVERT MONOMETHYL ETHERS OF 5-ALKYLPYROGALLOLS TO 2-METHOXY-4-ALKYL-6-(HYDROXYALKYXY)-PHENOL,AND RECOVERING THE THUS TREATED DISTILLATE.
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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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |