US2726931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen cyanide
Assignee: EIDP Inc
•
Filing: 1951-11-01
•
Granted: 1955-12-13
•
Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:03
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0212; C01C3/0216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE PROCESS WHICH COMPRISES PASSING A GASEOUS MIXTURE OF AMMONIA, NATURAL GAS, AND AIR OVER A PLATINUM ALLOY CATALYST, NATURAL GAS, AND AIR OVER A PLATINUM TICLES CONTAINING 90%-98% AL2O3 AND 1%-5% ZRO2.
Claim 2
Dependent Claim
33 words
THE PROCESS WHICH COMPRISES PASSING A GASEOUS MIXTURE OF AMMONIA, NATURAL GAS, AND AIR OVER A PLATINUM ALLOY CATALYST, NATURAL GAS, AND AIR OVER A PLATINUM TICLES CONTAINING 90%-98% AL2O3 AND 1%-5% ZRO2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |