Patent US2529546A successfully refreshed from Google Patents.
US2529546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrogen cyanide
Assignee: Celanese Corp
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Filing: 1945-12-07
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Granted: 1950-11-14
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Expires: 1965-12-07
Abstract
No abstract record available.
Inventors
- 👤 Fallows Leonard
- 👤 Mellers Eric Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:08
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
PROCESS FOR THE MANUFACTURE OF HYDROGEN CYANIDE, WHICH COMPRISES SUBJECTING FORMAMIDE IN THE VAPOR PHASE TO THERMAL DECOMPOSITION IN THE PRESENCE OF A CATALYST COMPRISING A METAL TUNGSTATE.
Claim 2
Dependent Claim
28 words
PROCESS FOR THE MANUFACTURE OF HYDROGEN CYANIDE, WHICH COMPRISES SUBJECTING FORMAMIDE IN THE VAPOR PHASE TO THERMAL DECOMPOSITION IN THE PRESENCE OF A CATALYST COMPRISING A METAL TUNGSTATE.
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) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |