Patent US3350408A successfully refreshed from Google Patents.
US3350408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfur-containing heterocyclic compounds
Assignee: Shell USA Inc
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Filing: 1965-12-14
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Granted: 1967-10-31
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Expires: 1985-12-14
Abstract
No abstract record available.
Inventors
- 👤 Russell L Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/08; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS OF INITIMATELY CONTACTING STRAIGHT-CHAIN C5-HYDROCARBON OF AT LEAST ONE TERMINAL METHYL GROUP AND OF FROM 0 TO 2 ETHYLENIC LINKAGES WITH FROM ABOUT 2 MOLES TO ABOUT 20 MOLES OF SULFUR PER MOLE OF SAID HYDROCARBON, IN THE VAPOR PHASE AT A TEMPERATURE FROM ABOUT 400*C. TO ABOUT 600*C.
Claim 2
Dependent Claim
51 words
THE PROCESS OF INITIMATELY CONTACTING STRAIGHT-CHAIN C5-HYDROCARBON OF AT LEAST ONE TERMINAL METHYL GROUP AND OF FROM 0 TO 2 ETHYLENIC LINKAGES WITH FROM ABOUT 2 MOLES TO ABOUT 20 MOLES OF SULFUR PER MOLE OF SAID HYDROCARBON, IN THE VAPOR PHASE AT A TEMPERATURE FROM ABOUT 400*C. TO ABOUT 600*C.
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |