Patent US3453071A successfully refreshed from Google Patents.
US3453071A
Expired / Lapsed
US
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Nitrogen oxide conversion
Assignee: Hibernia Chemie GmbH
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Filing: 1966-05-16
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Granted: 1969-07-01
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Karl Schmitt
- 👤 Wilhelm Ester
- 👤 Hans Heumann
- 👤 Harry Pauling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:15
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/50; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56; C01C; C01C1/00; C01C1/18
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |