Patent US3279891A successfully refreshed from Google Patents.
US3279891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for production of fine-crystalline boron phosphide
Assignee: Siemens Schuckertwerke AG
•
Filing: 1963-07-02
•
Granted: 1966-10-18
•
Expires: 1983-07-02
Abstract
No abstract record available.
Inventors
- 👤 Wenzel Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:57
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
AN APPARATUS FOR PRODUCING FINE-CRYSTALLINE BORON PHOSPHIDE FROM ELEMENT BORON AND PHOSPHROUS VAPOR, COMPEISING UPRIGHT RLONGATED REACTION CHAMBER MEANS HAVING A CLOSED UPPER END AND AN OPEN LOWER END; SUPPPORT MEANS PROVIDED IN SAID CHAMBER MEANS; FIRST CONTAINER MEANS FOR CONTAINING BORON AND SECOND CONTAINER MEANS FOR CONTAINING A PHOSPHORUS-VAPOR PRODUCING SUBSTANCE MOUNTED ON SAID SUPPORT MEANS, SAID FIRST CONTAINERS MEANS COMPRISING A PLURALITY OF SHALLOW SUPPLY CONTAINERS FOR BORON ADAPTED TO AFFORD A MAXIUM REACTIVE SURFACE AREA FOR THE BORON, SAID SECOND CONTAINER MEANS BEING LOCATED ABOVE SAID FIRST CONTAINER MEANS, BOTH SAID FIRST AND SECOND CONTAINER MEANS AND SAID SUPPORT MEANS CONSISTING OF MATERIAL RESISTANT TO OHOSPHROUS VAPOR AT HIGH TEMPERATURES; HEATING MEANS ABOVE THE LOWER END OF SAID CHAMBER MEANS FOR HEATING SAID CHAMBER MEANS TO A TEMPERATURE AT WHICH PHOSPHORUS VAPOR IS PRODUCED FROM A PHOSPHORUS-VAPOR PRODUCING SUBSTANCE CONTAINED IN SAID SECOND CONTAINER MEANS; AND COOLING MEANS CONNECTED TO THE LOWER OPEN END OF SAID CHAMBER MEANS BELOW SAID HEATING MEANS.
Claim 2
Independent Claim
165 words
AN APPARATUS FOR PRODUCING FINE-CRYSTALLINE BORON PHOSPHIDE FROM ELEMENT BORON AND PHOSPHROUS VAPOR, COMPEISING UPRIGHT RLONGATED REACTION CHAMBER MEANS HAVING A CLOSED UPPER END AND AN OPEN LOWER END; SUPPPORT MEANS PROVIDED IN SAID CHAMBER MEANS; FIRST CONTAINER MEANS FOR CONTAINING BORON AND SECOND CONTAINER MEANS FOR CONTAINING A PHOSPHORUS-VAPOR PRODUCING SUBSTANCE MOUNTED ON SAID SUPPORT MEANS, SAID FIRST CONTAINERS MEANS COMPRISING A PLURALITY OF SHALLOW SUPPLY CONTAINERS FOR BORON ADAPTED TO AFFORD A MAXIUM REACTIVE SURFACE AREA FOR THE BORON, SAID SECOND CONTAINER MEANS BEING LOCATED ABOVE SAID FIRST CONTAINER MEANS, BOTH SAID FIRST AND SECOND CONTAINER MEANS AND SAID SUPPORT MEANS CONSISTING OF MATERIAL RESISTANT TO OHOSPHROUS VAPOR AT HIGH TEMPERATURES; HEATING MEANS ABOVE THE LOWER END OF SAID CHAMBER MEANS FOR HEATING SAID CHAMBER MEANS TO A TEMPERATURE AT WHICH PHOSPHORUS VAPOR IS PRODUCED FROM A PHOSPHORUS-VAPOR PRODUCING SUBSTANCE CONTAINED IN SAID SECOND CONTAINER MEANS; AND COOLING MEANS CONNECTED TO THE LOWER OPEN END OF SAID CHAMBER MEANS BELOW SAID HEATING MEANS.
References Cited (Backward Citations)
US2482127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |