Patent US3144438A successfully refreshed from Google Patents.
US3144438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of organic sulfide derivatives and compositions resultingtherefrom
Assignee: IIT Research Institute
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Filing: 1962-04-17
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Granted: 1964-08-11
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Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Sosnovsky George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:21
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/32; C07C; C07C323/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
THE METHOD OF MAKING 2-BENZOXYTETRAHYDROTHIOPHENE WHICH COMPRISES THE STEPS OF: REACTING TETRAHYDROTHIOPHENE WITH TERTIARY BUTYL PERBENZOATE IN THE PRESENCE OF CUPROUS BROMIDE AND SEPARATING SAID 2-BENZOXYTETRAHYDROTHIOPHENE FROM THE OTHER REACTION PRODUCTS.
Claim 2
Independent Claim
31 words
THE METHOD OF MAKING 2-BENZOXYTETRAHYDROTHIOPHENE WHICH COMPRISES THE STEPS OF: REACTING TETRAHYDROTHIOPHENE WITH TERTIARY BUTYL PERBENZOATE IN THE PRESENCE OF CUPROUS BROMIDE AND SEPARATING SAID 2-BENZOXYTETRAHYDROTHIOPHENE FROM THE OTHER REACTION PRODUCTS.
Claim 3
Independent Claim
25 words
THE METHOD OF MAKING 2,3 DIHYDROTHIOPHENE WHICH COMPRISES THE STEPS OF: HEATING 2-BENZOYLOXYTETRAHYDROTHIOPHENE IN A PARTIAL VACUUM AND COLLECTING SAID 2,3 DIHYDROTHIOPHENE AS HEATING PROGRESSES.
Claim 4
Independent Claim
25 words
THE METHOD OF MAKING 2,3 DIHYDROTHIOPHENE WHICH COMPRISES THE STEPS OF: HEATING 2-BENZOYLOXYTETRAHYDROTHIOPHENE IN A PARTIAL VACUUM AND COLLECTING SAID 2,3 DIHYDROTHIOPHENE AS HEATING PROGRESSES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |