US2495567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acid derivatives from unsaturated compounds
Assignee: Rohm and Haas Co
•
Filing: 1945-08-18
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Granted: 1950-01-24
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Expires: 1965-08-18
Abstract
No abstract record available.
Inventors
- 👤 Carmack Marvin
- 👤 Tar De Los F De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:45
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/194
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR PREPARING AN AMIDE OF A CARBOXYLIC ACID WHICH COMPRISES REACTING BY HEATING IN EXCESS OF 100*C. A MIXTURE OF A HYDROCARBON WHICH POSSESSES AN ACYCLICALLY UNSATURATED CHAIN, SULFUR, AND A BASIC TRIVALENT NITROGEN COMPOUND IN WHICH THE NITROGEN CARRIES AT LEAST ONE HYDROGEN ATOM AND ANY OTHER N-SUBSTITUENT IS A MEMBER OF THE CLASS CONSISTING OF ALKYL GROUPS OF NOT OVER EIGHT CARBON ATOMS, THE DIVALENT
Claim 2
Dependent Claim
48 words
A PROCESS FOR PREPARING PHENYLACETOTHIOMORPHOLIDE WHICH COMPRISES MIXING TOGETHER STYRENE, SULFUR, AND MORPHOLINE, THE AMOUNT OF SULFUR AND MORPHOLINE IN THE MIXTURE BEING IN CHEMICAL EXCESS OF THE STYRENE, HEATING THE MIXTURE AT A TEMPERTURE BETWEEN 130*C. AND 230* C., AND SEPARATING THE THIOMORPHOLIDE FROM THE REACTION MIXTURE.
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) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |