US2494610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of glycol thioethers
Assignee: Sharples Chemicals Inc
•
Filing: 1947-02-06
•
Granted: 1950-01-17
•
Expires: 1967-02-06
Abstract
No abstract record available.
Inventors
- 👤 John B Davidson
- 👤 John F Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
C; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A PROCESS FOR THE CONDENSATION OF A MERCAPTAN WITH ETHYLENE OXIDE IN THE PRESENCE OF A CATALYST FOR SAID CONDENSATION, THE STEPS COMPRISING FLOWING A STREAM ORIGINALLY CONTAINING SAID MERCAPTAN, SAID CATALYST AND AT LEAST 0.5 MOLECULAR EQUIVALENT OF ETHYLENE OXIDE BASED ON MERCAPTAN THROUGH AN INITIAL REACTION ZONE MAINTAINED UNDER TEMPERATURE CONDITIONS BELOW 75*
Claim 2
Dependent Claim
56 words
IN A PROCESS FOR THE CONDENSATION OF A MERCAPTAN WITH ETHYLENE OXIDE IN THE PRESENCE OF A CATALYST FOR SAID CONDENSATION, THE STEPS COMPRISING FLOWING A STREAM ORIGINALLY CONTAINING SAID MERCAPTAN, SAID CATALYST AND AT LEAST 0.5 MOLECULAR EQUIVALENT OF ETHYLENE OXIDE BASED ON MERCAPTAN THROUGH AN INITIAL REACTION ZONE MAINTAINED UNDER TEMPERATURE CONDITIONS BELOW 75*
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |