US3230044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoclinic zinc phosphide preparation
Assignee: RCA Corp
•
Filing: 1962-08-10
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Granted: 1966-01-18
•
Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Imre J Hegyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:24
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD FOR PREPARING BLACK MONOCLINIC ZINC PHOSPHIDE COMPRISING REACTING ELEMENTAL ZINC VAPOR WITH ELEMENTAL PHOSPHORUS VAPOR AND THEN MAINTAINING THE REACTION PRODUCT AT ABOUT 700 TO 580*C AT PRESSURES OF AT LEAST THREE ATMOSPHERES, WHEREBY SAID ZINC PHOSPHIDE CRYSTALLIZES THEREFROM.
Claim 2
Independent Claim
41 words
A METHOD FOR PREPARING BLACK MONOCLINIC ZINC PHOSPHIDE COMPRISING REACTING ELEMENTAL ZINC VAPOR WITH ELEMENTAL PHOSPHORUS VAPOR AND THEN MAINTAINING THE REACTION PRODUCT AT ABOUT 700 TO 580*C AT PRESSURES OF AT LEAST THREE ATMOSPHERES, WHEREBY SAID ZINC PHOSPHIDE CRYSTALLIZES 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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |