US2705730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic fluorides
Assignee: Dow Chemical Co
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Filing: 1949-11-25
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Granted: 1955-04-05
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 James D Head
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:59
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/18; C07C41/22; C07B; C07B39/00; C07C17/00; C07C17/093
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A METHOD OF CONVERTING 3-CHLORO-6-METHOXY BENZENE DIAZONIUM FLUOBORATE TO 4-CHLORO-2-FLUORO ANISOLE THAT COMPRISES (1) CONTINUOUSLY CONVEYING THE FLUOBORATE IN ITS SOLID STATE INTO CONTACT WITH A NICKEL ROLL HEATED TO A TEMPERATURE BETWEEN ABOUT 290*C. AND ABOUT 310*C. AND SIMULTANEOUSLY ROTATING THE ROLL TO SPREAD THE FLUOBORATE THEREON AS A THIN COATING, (2) COLLECTING THE DECOMPOSITION PRODUCTS, (3) SUBJECTING THE COLLECTED DECOMPOSITION PRODUCTS TO THE ACTION OF A 5 PER CENT AQUEOUS CHLORO-2-FLUOROANISLOE FROM THE AQUEOUS SOLUTION.
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) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |