US2443015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenated polyalkylated phenol
Assignee: Gulf Research and Development Co
•
Filing: 1946-04-19
•
Granted: 1948-06-08
•
Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Whitaker
- 👤 William W Weinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/385; C07C49/403; C07C45/00; C07C45/006
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2087691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-08 | 1951-12-08 | 1952-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-08 | 1955-12-08 | 1956-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-08 | 1959-12-08 | 1960-06-08 | $7700.00 | Window Closed / Lapsed |