US2704299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of bis-chloromethyl ether
Assignee: GAF Chemicals Corp
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Filing: 1952-04-15
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Granted: 1955-03-15
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Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Saul R Buc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR PREPARING BIS-CHLOROMETHYL ETHER COMPRISING REACTING FORMALDEHYDE, CHLOROSULFONIC ACID AND HCI BY MIXING AT A TEMPERATURE OF FROM ABOUT 0* C. TO ROOM TEMPERATURE IN SUCH PROPORTIONS THAT THE AMOUNTS OF CHLOROSULFONIC ACID AND HCI ARE SUFFICIENT TO SUPPLY FROM ABOUT 1.1 TO 1.4 MOLES OF AVAILABLE CHLORINE PER MOLE OF FORMALDEHYDE, AND A FINAL SULFURIC ACID CONCENTRATION OF ABOUT 50 TO 100 PER CENT.
Claim 2
Dependent Claim
67 words
A PROCESS FOR PREPARING BIS-CHLOROMETHYL ETHER COMPRISING REACTING FORMALDEHYDE, CHLOROSULFONIC ACID AND HCI BY MIXING AT A TEMPERATURE OF FROM ABOUT 0* C. TO ROOM TEMPERATURE IN SUCH PROPORTIONS THAT THE AMOUNTS OF CHLOROSULFONIC ACID AND HCI ARE SUFFICIENT TO SUPPLY FROM ABOUT 1.1 TO 1.4 MOLES OF AVAILABLE CHLORINE PER MOLE OF FORMALDEHYDE, AND A FINAL SULFURIC ACID CONCENTRATION OF ABOUT 50 TO 100 PER CENT.
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) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |