Patent US1175732A successfully refreshed from Google Patents.
US1175732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing finely-divided carbon and by-products from coal-pitch.
Assignee: Individual
•
Filing: 1915-12-22
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Granted: 1916-03-14
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Expires: 1935-12-22
Abstract
No abstract record available.
Inventors
- 👤 Archibald Claude Evans
- 👤 Percy Jose Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
C; C01; C01B; C01B32/00; B; B82; B82Y; B82Y30/00
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) | 1919-03-14 | 1919-09-13 | 1920-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-03-14 | 1923-09-13 | 1924-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-03-14 | 1927-09-13 | 1928-03-14 | $7700.00 | Window Closed / Lapsed |