US2455058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reacting acetylene and potassium hydroxide
Assignee: Publicker Ind Inc
•
Filing: 1946-09-12
•
Granted: 1948-11-30
•
Expires: 1966-09-12
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:07
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/44; C07; C07C; C07C29/00; C07C29/36; C07C29/38; C07C29/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |