US3424808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation and methanation catalyst and process
Assignee: Chemetron Corp
•
Filing: 1967-10-03
•
Granted: 1969-01-28
•
Expires: 1987-10-03
Abstract
No abstract record available.
Inventors
- 👤 Charles C Brewer
- 👤 Richard C Fritz
- 👤 James M Moe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:54
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; C07C5/32; C07C5/321; C07C5/322; C07C5/327; C07C5/333; C07C5/3332; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/46; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/75; C07C2523/755; C07C2523/76; C07C2523/78; C07C2523/84; C07C2523/85; C07C2523/86; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |