US1933410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of waste products obtained in the refining of hydrocarbon material
Assignee: TRINIDAD LEASCHOLDS Ltd
•
Filing: 1932-05-05
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Granted: 1933-10-31
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Expires: 1952-05-05
Abstract
No abstract record available.
Inventors
- 👤 Blair Sidney Martin
- 👤 Melvill Francis Leopold
- 👤 Berry Arthur George Vale
- 👤 Banks Bernard George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:05
CPC Classifications
C; C10; C10G; C10G19/00; C07; C07C; C07C37/00; C07C37/005; C07C37/009
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) | 1936-10-30 | 1937-05-01 | 1937-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-30 | 1941-05-01 | 1941-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-30 | 1945-05-01 | 1945-10-31 | $7700.00 | Window Closed / Lapsed |