Patent US2450384A successfully refreshed from Google Patents.
US2450384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of factice and sulfurized oils
Assignee: Anchor Chemical Co Ltd
•
Filing: 1946-02-06
•
Granted: 1948-09-28
•
Expires: 1966-02-06
Abstract
No abstract record available.
Inventors
- 👤 Roberts Kenneth Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:17
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/30; C07C335/32; C08; C08H; C08H3/00
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) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |