Patent US2576138A successfully refreshed from Google Patents.
US2576138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfite esters
Assignee: PPG Industries Inc
•
Filing: 1947-01-02
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Granted: 1951-11-27
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Expires: 1967-01-02
Abstract
No abstract record available.
Inventors
- 👤 Pechukas Alphonse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:21
CPC Classifications
C; C07; C07C; C07C301/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A METHOD OF PREPARING AN ESTER WHICH COMPRISES REACTING A 1,2 EPOXIDE WITH A THIONYL HALIDE.
Claim 2
Independent Claim
16 words
A METHOD OF PREPARING AN ESTER WHICH COMPRISES REACTING A 1,2 EPOXIDE WITH A THIONYL HALIDE.
Claim 3
Dependent Claim
22 words
MIXTURES OF BIS (BETA CHLORO N-BUTENYL) SULFITES WHICH COMPRISES SAID SULFITES OF THE BETA N-BUTENYL ALCHOLS: 2-CHLORO-3 BUTENOL AND CHLOROMETHYL VINYL CARBINOL.
Claim 4
Dependent Claim
22 words
MIXTURES OF BIS (BETA CHLORO N-BUTENYL) SULFITES WHICH COMPRISES SAID SULFITES OF THE BETA N-BUTENYL ALCHOLS: 2-CHLORO-3 BUTENOL AND CHLOROMETHYL VINYL CARBINOL.
References Cited (Backward Citations)
US2377148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |