US3428619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension handling
Assignee: Phillips Petroleum Co
•
Filing: 1965-05-27
•
Granted: 1969-02-18
•
Expires: 1985-05-27
Abstract
No abstract record available.
Inventors
- 👤 Harold M Hawkins
- 👤 Don C Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:56
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1812; B01J19/1837; B01J19/24; B01J19/245; C; C08; C08F; C08F6/00; C08F6/24; B01J2219/00; B01J2219/00002; B01J2219/00004; B01J2219/00006; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3201365A
Cited
US3280091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |