US3480558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst regeneration
Assignee: Millennium Petrochemicals Inc
•
Filing: 1966-06-10
•
Granted: 1969-11-25
•
Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 David W Lum
- 👤 Irving L Mador
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
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) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |