US2878266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloromethylation process
Assignee: FMC Corp
•
Filing: 1957-03-21
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Granted: 1959-03-17
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Wachs Herman
- 👤 Sylvan E Forman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:55
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/50; C07D317/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
AN IMPROVED PROCESS FOR PREPARING CHLOROMETHYL DIHYDROSAFROL, COMPRISING REACTING HYDROGENATED SAFROLBEARING OILS AT 60-90*C. IN AN AQUEOUS SYSTEM CONTAINING PARAFORMALDEHYDE, EXCESS HYDROCHLORIC ACID AND ABOUT 10-18 PERCENT BY WEIGHT OF CALCIUM CHLORIDE, ADJUSTING THE HYDROGEN CHLORIDE CONCENTRATION WHEREBY THE AQUEOUS PHASE AT THE END OF THE REACTION IS ABOUT 5.5-8.0 NORMAL IN HYDROCHLORIC ACID.
Claim 2
Dependent Claim
54 words
AN IMPROVED PROCESS FOR PREPARING CHLOROMETHYL DIHYDROSAFROL, COMPRISING REACTING HYDROGENATED SAFROLBEARING OILS AT 60-90*C. IN AN AQUEOUS SYSTEM CONTAINING PARAFORMALDEHYDE, EXCESS HYDROCHLORIC ACID AND ABOUT 10-18 PERCENT BY WEIGHT OF CALCIUM CHLORIDE, ADJUSTING THE HYDROGEN CHLORIDE CONCENTRATION WHEREBY THE AQUEOUS PHASE AT THE END OF THE REACTION IS ABOUT 5.5-8.0 NORMAL IN HYDROCHLORIC ACID.
References Cited (Backward Citations)
US2485681A
Cited
US2485680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |