US2470894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyolefinic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1945-09-21
•
Granted: 1949-05-24
•
Expires: 1965-09-21
Abstract
No abstract record available.
Inventors
- 👤 Warren W Johnstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/945
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2301335A
Cited
US2360629A
Cited
US2343744A
Cited
US2413310A
Cited
US2371341A
Cited
US2378636A
Cited
US2408933A
Cited
US2388156A
Cited
US2392962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |