Patent US3126256A successfully refreshed from Google Patents.
US3126256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of phosgene from bcij
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR PURIFYING A STREAM CONSISTING PRIMARILY OF BORON TRICHLORIDE AND CONTAINING PHOSGENE AS AN IMPURITY COMPRISING: PASSING A STREAM CONTAINING BORON TRICHLORIDE AND PHOSGENE AS AN IMPURITY OVER A CATALYST CONSISTING OF CARBON MAINTAINED AT A TEMPERATURE OF BETWEEN ABOUT 300*C. AND 700*C. WHEREBY SAID PHOSGENE IS CRACKED TO CARBON MONOXIDE AND FREE CHLORINE AND REMOVING THE CARBON MONOXIDE AND CHLORINE SO PRODUCED FROM THE BORON TRICHLORIDE STREAM WHEREBY TO PRODUCE SUBSTANTIALLY PURE BORON TRICHLORIDE.
Claim 2
Dependent Claim
77 words
A PROCESS FOR PURIFYING A STREAM CONSISTING PRIMARILY OF BORON TRICHLORIDE AND CONTAINING PHOSGENE AS AN IMPURITY COMPRISING: PASSING A STREAM CONTAINING BORON TRICHLORIDE AND PHOSGENE AS AN IMPURITY OVER A CATALYST CONSISTING OF CARBON MAINTAINED AT A TEMPERATURE OF BETWEEN ABOUT 300*C. AND 700*C. WHEREBY SAID PHOSGENE IS CRACKED TO CARBON MONOXIDE AND FREE CHLORINE AND REMOVING THE CARBON MONOXIDE AND CHLORINE SO PRODUCED FROM THE BORON TRICHLORIDE STREAM WHEREBY TO PRODUCE SUBSTANTIALLY PURE BORON TRICHLORIDE.
References Cited (Backward Citations)
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Cited
GB229334A
Cited
US2097482A
Cited
US2415958A
Cited
US2369214A
Cited
US3037337A
Cited
US2931710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |