US2690957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making alkali metal cyanates or alkali metal thiocyanates
Assignee: Mathieson Chemical Corp
•
Filing: 1950-11-21
•
Granted: 1954-10-05
•
Expires: 1970-11-21
Abstract
No abstract record available.
Inventors
- 👤 Horst William P Ter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:25
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE590232C
Cited
GB339220A
Cited
US1915425A
Cited
GB339371A
Cited
FR713520A
Cited
GB359559A
Cited
DE551776C
Cited
FR39282E
Cited
US1971009A
Cited
US2345826A
Cited
US2546551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |