US3616374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-limonene dimercaptan process
Assignee: Pennwalt Corp
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Filing: 1969-09-24
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Granted: 1971-10-26
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Expires: 1989-09-24
Abstract
Abstract A continuous process for preparing d-limonene dimercaptan by exposing a continuously flowing liquid mixture of d-limonene and hydrogen sulfide to ultraviolet light at a temperature between about 0* C. and about 25* C., at a pressure between 175 to 250 p.s.i.g., said mixture of hydrogen sulfide and d-limonene being at a mole ratio of from between about 10:1 to about 25:1.
Inventors
- 👤 Roland Henry Goshorn
- 👤 Paul Daniel Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:04
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/02; C07C319/04; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
The process of claim 1 where the mole ratio of hydrogen sulfide to d-limonene is about 20:1.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |