Patent US3073679A successfully refreshed from Google Patents.
US3073679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of single crystal boron phosphide
Assignee: Monsanto Chemicals Ltd
•
Filing: 1959-06-29
•
Granted: 1963-01-15
•
Expires: 1979-06-29
Abstract
No abstract record available.
Inventors
- 👤 Bobbie D Stone
- 👤 Robert A Ruehrwein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:17
CPC Classifications
C; C30; C30B; C30B25/00; C01; C01B; C01B25/00; C01B25/06; C30B29/00; C30B29/10; C30B29/40; Y; Y10; Y10S; Y10S148/00; Y10S148/113; Y10S148/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
PROCESS FOR THE PRODUCTION OF SINGLE CRYSTALS OF BORON PHOSPHIDE WHICH COMPRISES CONTACTING A CRUDE SOURCE OF BORON PHOSPHIDE WITH A HYDROGEN HALIDE VAPOR AT A TEMPERATURE IN THE RANGE OF FROM 600*C. TO 1,500*C., AND SUBJECTING THE RESULTING GAS MIXTURE TO A REGION OF HIGHER TEMPERATURE WITHIN THE RANGE OF FROM 800*C. TO 1,800* C., WITH A TEMPERATURE INCREASE FROM THE FIRST ZONE TO THE SECOND ZONE OF FROM 50*C TO 1,000*C., WHEREBY A SINGLE CRYSTAL FORM OF BORON PHOSPHIDE IS DEPOSITED IN THE SAID SECOND ZONE.
Claim 2
Dependent Claim
88 words
PROCESS FOR THE PRODUCTION OF SINGLE CRYSTALS OF BORON PHOSPHIDE WHICH COMPRISES CONTACTING A CRUDE SOURCE OF BORON PHOSPHIDE WITH A HYDROGEN HALIDE VAPOR AT A TEMPERATURE IN THE RANGE OF FROM 600*C. TO 1,500*C., AND SUBJECTING THE RESULTING GAS MIXTURE TO A REGION OF HIGHER TEMPERATURE WITHIN THE RANGE OF FROM 800*C. TO 1,800* C., WITH A TEMPERATURE INCREASE FROM THE FIRST ZONE TO THE SECOND ZONE OF FROM 50*C TO 1,000*C., WHEREBY A SINGLE CRYSTAL FORM OF BORON PHOSPHIDE IS DEPOSITED IN THE SAID SECOND ZONE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |