US2447006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfo compositions
Assignee: GREAT LAKES CARBON CORP
•
Filing: 1946-02-23
•
Granted: 1948-08-17
•
Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Bernard W Gamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:43
CPC Classifications
B; B01; B01J; B01J20/00; C; C07; C07G; C07G99/00; C07G99/002; C07G99/0022; C10; C10C; C10C3/00; C10C3/02; C10C3/023
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |