US3246949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of boron trifluoride
Assignee: Dow Chemical Co
•
Filing: 1965-05-28
•
Granted: 1966-04-19
•
Expires: 1985-05-28
Abstract
No abstract record available.
Inventors
- 👤 Olstowski Franciszek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF PRODUCING BORON TRIFLUORIDE COMPRISING, REACTING AN ALKALI METAL FLUOBORATE WITH AN ANHYDROUS ACIDIC CHLORIDE SELECTED FROM THE GROUP CONSISTING OF BCL3, SICL4, TICL4, SNCL4, FECL3, PCL3, SBCL5, CRCL3 AND ALCL3, AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 400 DEGREES CENTIGRADE, AND REMOVING BORON TRIFLUORIDE AS A PRODUCT OF THE REACTION.
Claim 2
Independent Claim
55 words
A METHOD OF PRODUCING BORON TRIFLUORIDE COMPRISING, REACTING AN ALKALI METAL FLUOBORATE WITH AN ANHYDROUS ACIDIC CHLORIDE SELECTED FROM THE GROUP CONSISTING OF BCL3, SICL4, TICL4, SNCL4, FECL3, PCL3, SBCL5, CRCL3 AND ALCL3, AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 400 DEGREES CENTIGRADE, AND REMOVING BORON TRIFLUORIDE AS A PRODUCT OF THE REACTION.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |