Patent US2219042A successfully refreshed from Google Patents.
US2219042A
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Preparation of catalysts
Assignee: HYDROCARBON SYNTHESIS CORP
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Filing: 1938-09-17
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Granted: 1940-10-22
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Expires: 1958-09-17
Abstract
No abstract record available.
Inventors
- 👤 Heckel Heinrich
- 👤 Roelen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/75; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/156; B01J21/00; B01J21/10; B01J23/76; B01J23/78; B01J37/00; B01J37/02; B01J37/03; C07C2521/00; C07C2521/10; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |