Patent US3546139A successfully refreshed from Google Patents.
US3546139A
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Molybdenum,niobium,tantalum,arsenic in catalysts for vapor phase production of alpha,beta-unsaturated acids
Assignee: Eastman Kodak Co
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Filing: 1969-11-03
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Granted: 1970-12-08
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Expires: 1989-11-03
Abstract
No abstract record available.
Inventors
- 👤 Howard S Young
- 👤 George C Anderson
- 👤 Edgar L Mcdaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:59
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/002; B01J23/16; B01J23/20; B01J23/24; B01J23/28; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J23/18; B01J2523/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3177257A
Cited
US2347358A
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US2776316A
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GB904304A
Cited
GB990639A
Cited
US3318863A
Cited
US3280193A
Cited
US3342849A
Cited
US3359309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |