US3519574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of catalyst material and catalyst material produced thereby
Assignee: Wyeth Holdings LLC
•
Filing: 1967-07-10
•
Granted: 1970-07-07
•
Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph Dennis Colgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:40
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2503913A
Cited
US2831652A
Cited
US3067128A
Cited
US3004292A
Cited
US3154603A
Cited
US3390100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |