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US3549556A
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Spherical methanation catalysts
Assignee: Catalysts and Chemicals Inc
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Filing: 1968-07-26
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Granted: 1970-12-22
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Expires: 1988-07-26
Abstract
No abstract record available.
Inventors
- 👤 Edward K Dienes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:20
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J23/00; B01J23/70; C; C07; C07C; C07C1/00; C07C1/02; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/16; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3445402A
Cited
US3264069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |