US1387170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing hydrocyanic acid
Assignee: POINDEXTER AND Co
•
Filing: 1920-07-06
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Granted: 1921-08-09
•
Expires: 1940-07-06
Abstract
No abstract record available.
Inventors
- 👤 Poindexter Robert Wade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:03
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0229; C01C3/0233
Claims Analysis
Total Claims: 0
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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) | 1924-08-08 | 1925-02-07 | 1925-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-08-08 | 1929-02-07 | 1929-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-08-08 | 1933-02-07 | 1933-08-09 | $7700.00 | Window Closed / Lapsed |