US3029948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering technique
Assignee: Phillips Petroleum Co
•
Filing: 1957-09-16
•
Granted: 1962-04-17
•
Expires: 1977-09-16
Abstract
No abstract record available.
Inventors
- 👤 Dwight L Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/44; B01D33/46; B01D33/466; B01D33/06; B01D33/073; B01D2201/00; B01D2201/48; B01D37/00; Y; Y10; Y10S; Y10S159/00; Y10S159/25
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1895276A
Cited
US1199861A
Cited
US1348159A
Cited
US1512321A
Cited
US1774044A
Cited
US2341045A
Cited
US2379754A
Cited
US2337385A
Cited
US2525135A
Cited
US2851161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |