Patent US3379635A successfully refreshed from Google Patents.
US3379635A
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US
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Method of preserving the catalytic activity of sensitive catalysts
Assignee: VARTA AG
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Filing: 1965-01-15
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Granted: 1968-04-23
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Expires: 1985-01-15
Abstract
No abstract record available.
Inventors
- 👤 Doehren Hans H Von
- 👤 Jung Margarete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
B; B01; B01J; B01J37/00; B01J25/00; B01J25/02; B01J37/0009
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |