US3402022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing hydrogen and a catalyst therefor
Assignee: Universal Oil Products Co
•
Filing: 1965-01-04
•
Granted: 1968-09-17
•
Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 John C Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:19
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/24; C01B3/28; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |