US3455843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon oxidation catalyst
Assignee: WR Grace and Co
•
Filing: 1966-05-04
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Granted: 1969-07-15
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Warren Stanley Briggs
- 👤 William Albert Stover
- 👤 Donald Stuart Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8993; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J35/00; B01J35/50; B01J35/51
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |