US2708198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pentaerythrite-dichlorhydrine monosulfurous acid esters
Assignee: Henkel AG and Co KGaA
•
Filing: 1952-04-30
•
Granted: 1955-05-10
•
Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Pietsch Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:15
CPC Classifications
C; C07; C07D; C07D327/00; C07D327/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
METHOD FOR THE PRODUCTION OF PENTAERYTHRITE-DICHLOROHYDRINE MONOSULFUROUS ACID ESTER WHICH COMPRISES REACTING THIONYL CHLORIDE AND PENTAERYTHRITE IN THE PRES ENCE OF 0.2-2 MOLS PYRIDINE FOR EACH MOL OF PENTAERYTHRITE AND RECOVERING FROM THE REACTION MIX PENTAERYTHRITEDICHLOROHYDRINE MONSOULFUROUS ACID ESTERS.
Claim 2
Dependent Claim
39 words
METHOD FOR THE PRODUCTION OF PENTAERYTHRITE-DICHLOROHYDRINE MONOSULFUROUS ACID ESTER WHICH COMPRISES REACTING THIONYL CHLORIDE AND PENTAERYTHRITE IN THE PRES ENCE OF 0.2-2 MOLS PYRIDINE FOR EACH MOL OF PENTAERYTHRITE AND RECOVERING FROM THE REACTION MIX PENTAERYTHRITEDICHLOROHYDRINE MONSOULFUROUS ACID ESTERS.
Claim 3
Dependent Claim
22 words
METHOD ACCORDING TO CLAIM 1 IN WHICH THERE ARE USED AT LEAST 2 MOL OF THIONYL CHLORIDE FOR EACH MOL OF PENTAERYTHRITE.
References Cited (Backward Citations)
US710350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |