US1939587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions of coal in oil
Assignee: CUNARD STEAM SHIP CO Ltd
•
Filing: 1932-06-22
•
Granted: 1933-12-12
•
Expires: 1952-06-22
Abstract
No abstract record available.
Inventors
- 👤 Adam Robert Andrew
- 👤 Holmes Fredrick Charles Victor
- 👤 Perrins Arthur Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322
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) | 1936-12-11 | 1937-06-12 | 1937-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-11 | 1941-06-12 | 1941-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-11 | 1945-06-12 | 1945-12-12 | $7700.00 | Window Closed / Lapsed |