Patent US2458378A successfully refreshed from Google Patents.
US2458378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating metallic sodium from high molecular weight polymers made by polymerization of vinyl compounds
Assignee: Phillips Petroleum Co
•
Filing: 1946-01-07
•
Granted: 1949-01-04
•
Expires: 1966-01-07
Abstract
No abstract record available.
Inventors
- 👤 Herbolsheimer Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:13
CPC Classifications
C; C08; C08C; C08C3/00; C08C3/02; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1058056A
Cited
US2347464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |