US2016169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of carbonaceous materials
Assignee: Gas Light and Coke Co
•
Filing: 1933-04-17
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Granted: 1935-10-01
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Expires: 1953-04-17
Abstract
No abstract record available.
Inventors
- 👤 Griffith Roland Hall
- 👤 Bruce Robert Nigel B Dalrymple
- 👤 Hill Samuel Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:37
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12
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) | 1938-09-30 | 1939-04-01 | 1939-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-30 | 1943-04-01 | 1943-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-30 | 1947-04-01 | 1947-10-01 | $7700.00 | Window Closed / Lapsed |