Patent US3021922A successfully refreshed from Google Patents.
US3021922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery and purification of boron trichloride
Assignee: Dow Chemical Co
•
Filing: 1958-07-29
•
Granted: 1962-02-20
•
Expires: 1978-07-29
Abstract
No abstract record available.
Inventors
- 👤 Eldred L Dance
- 👤 Jr Thomas E Drisko
- 👤 Earl A Mclain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:15
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR THE RECOVERY OF BORON TRICHLORIDE FROM A HOT GASEOUS EFFLUENT CONTAINING ENTRAINED PARTICLES AND NON-CONDENSIBLE GASES RESULTING FROM THE REACTION OF A BORON COMPOUND WITH CARBON AND CHLORINE AT A TEMPERATURE ABOVE 600*C., WHICH COMRISES PASSING THE HOT GASEOUS EFFLUENT IN CONTACT WITH AN INERT LIQUID HAVING A BOILING POINT IN THE RANGE OF 70* TO 200*C. WHICH IS A SOLVENT FOR THE BORON TRICHLORIDE IN A RATIO SUCH THAT SUBSTANTIALLY ALL OF SAID INERT LIQUID IS VAPORIZED, COOLING THE GASEOUS AND VAPOROUS EFFLUENT RESULTING FROM THE CONTACTING OF THE HOT GASES WITH THE INERT LIQUID TO CONDENSE A MAJOR PORTION OF THE INERT LIQUID, SEPARATING THE CONDENSED INERT LIQUID FROMTHE UNCONDENSED PORTION OF THE GASEOUS AND VAPOROUS EFFLUENT, RETURNING THE
Claim 2
Dependent Claim
124 words
A PROCESS FOR THE RECOVERY OF BORON TRICHLORIDE FROM A HOT GASEOUS EFFLUENT CONTAINING ENTRAINED PARTICLES AND NON-CONDENSIBLE GASES RESULTING FROM THE REACTION OF A BORON COMPOUND WITH CARBON AND CHLORINE AT A TEMPERATURE ABOVE 600*C., WHICH COMRISES PASSING THE HOT GASEOUS EFFLUENT IN CONTACT WITH AN INERT LIQUID HAVING A BOILING POINT IN THE RANGE OF 70* TO 200*C. WHICH IS A SOLVENT FOR THE BORON TRICHLORIDE IN A RATIO SUCH THAT SUBSTANTIALLY ALL OF SAID INERT LIQUID IS VAPORIZED, COOLING THE GASEOUS AND VAPOROUS EFFLUENT RESULTING FROM THE CONTACTING OF THE HOT GASES WITH THE INERT LIQUID TO CONDENSE A MAJOR PORTION OF THE INERT LIQUID, SEPARATING THE CONDENSED INERT LIQUID FROMTHE UNCONDENSED PORTION OF THE GASEOUS AND VAPOROUS EFFLUENT, RETURNING THE
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |