Patent US1844388A successfully refreshed from Google Patents.
US1844388A
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US
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Catalytic oxidation of naphthalene
Assignee: Selden Co
•
Filing: 1928-03-28
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Granted: 1932-02-09
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Expires: 1948-03-28
Abstract
No abstract record available.
Inventors
- 👤 Alphons O Jafger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:26
CPC Classifications
C; C07; C07C; C07C50/00; C07C50/16; C07C50/18; C07B; C07B35/00; C07B35/04; C07C46/00; C07C46/02; C07C46/04; C07C51/00; C07C51/16; C07C51/31; C07C51/313
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) | 1935-02-08 | 1935-08-10 | 1936-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-08 | 1939-08-10 | 1940-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-08 | 1943-08-10 | 1944-02-09 | $7700.00 | Window Closed / Lapsed |