US3498908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone pressure-drop additive for hydrocracking process
Assignee: Sinclair Research Inc
•
Filing: 1966-07-25
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Granted: 1970-03-03
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 John H Frankovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:20
CPC Classifications
C; C10; C10G; C10G49/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/0278; B01J2219/00; B01J2219/00049; B01J2219/00245; B01J2219/0025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |