US1905423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of tar
Assignee: AMERICAN TAR PRODUCTS Co
•
Filing: 1930-01-02
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Granted: 1933-04-25
•
Expires: 1950-01-02
Abstract
No abstract record available.
Inventors
- 👤 Edmund O Rhodes
- 👤 Floyd D Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:25
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/18
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) | 1936-04-24 | 1936-10-24 | 1937-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-04-24 | 1940-10-24 | 1941-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-04-24 | 1944-10-24 | 1945-04-25 | $7700.00 | Window Closed / Lapsed |