US2922699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of boron nitride
Assignee: Union Carbide Corp
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Filing: 1957-12-11
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Granted: 1960-01-26
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Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 Wilbur R Lauzau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PRODUCTION OF BORON NITRIDE, WHICH PROCESS COMPRISES REACTING DICYANDIAMIDE WITH BORIC ACID IN THE PRESENCE OF A SUFFICIENT AMOUNT OF AMMONIUM CHLORIDE TO SUBSTANTIALLY INHIBIT FROTHING, AND IN THE ABSENCE OF OXYGEN SAID BORIC ACID AND SAID DICYANDIAMIDE BEING PRESENT IN A MOLAR RATIO OF NOT LESS THAN TWO MOLES OF BORIC ACID PER MOLE OF DICYANDIAMIDE, AND HEATING THE REACTION PRODUCT TO A TEMPERATURE SUFFICIENT TO REMOVE SUBSTANTIALLY ALL VOLATILE MATTER THEREFROM.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PRODUCTION OF BORON NITRIDE, WHICH PROCESS COMPRISES REACTING DICYANDIAMIDE WITH BORIC ACID IN THE PRESENCE OF A SUFFICIENT AMOUNT OF AMMONIUM CHLORIDE TO SUBSTANTIALLY INHIBIT FROTHING, AND IN THE ABSENCE OF OXYGEN SAID BORIC ACID AND SAID DICYANDIAMIDE BEING PRESENT IN A MOLAR RATIO OF NOT LESS THAN TWO MOLES OF BORIC ACID PER MOLE OF DICYANDIAMIDE, AND HEATING THE REACTION PRODUCT TO A TEMPERATURE SUFFICIENT TO REMOVE SUBSTANTIALLY ALL VOLATILE MATTER THEREFROM.
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |