US3437601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zeolite regeneration process
Assignee: Universal Oil Products Co
•
Filing: 1965-09-13
•
Granted: 1969-04-08
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Hertha Skala
- 👤 Donald B Broughton
- 👤 Armand J De Rosset
- 👤 A Gregory Lickus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/34; B01J20/3408; C; C10; C10G; C10G25/00; C10G25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3075023A
Cited
US3330778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |