Patent US3874655A successfully refreshed from Google Patents.
Patent US3306910A successfully refreshed from Google Patents.
US3306910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of thiolactam compounds
Assignee: Phillips Petroleum Co
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Filing: 1964-09-14
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Granted: 1967-02-28
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Rector P Lonthan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:50
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
A METHOD FOR PRODUCING THIOLACTAMS COMPRISING REACTING AT AN ELEVATED TEMPERATURE A LACTAM REPRESENTED BY THE FORMULA:
Claim 2
Independent Claim
17 words
A METHOD FOR PRODUCING THIOLACTAMS COMPRISING REACTING AT AN ELEVATED TEMPERATURE A LACTAM REPRESENTED BY THE FORMULA:
Claim 3
Independent Claim
31 words
A METHOD FOR MAKING N-METHYLPYRROLIDINE-2-THIONE COMPRISING REACTING N-METHYL-2-PYRROLIDINONE WITH H2S IN THE PRESENCE OF NAOH AT AN ELEVATED TEMPERATURE AND PRESSURE FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE SAID THIONE.
Claim 4
Independent Claim
31 words
A METHOD FOR MAKING N-METHYLPYRROLIDINE-2-THIONE COMPRISING REACTING N-METHYL-2-PYRROLIDINONE WITH H2S IN THE PRESENCE OF NAOH AT AN ELEVATED TEMPERATURE AND PRESSURE FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE SAID THIONE.
References Cited (Backward Citations)
US2201200A
Cited
US2806879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |