Patent US3587193A successfully refreshed from Google Patents.
Patent US1386768A successfully refreshed from Google Patents.
US1386768A
Expired / Lapsed
US
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Oil-cracking process and apparatus therefor
Assignee: Individual
•
Filing: 1920-04-05
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Granted: 1921-08-09
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Expires: 1940-04-05
Abstract
No abstract record available.
Inventors
- 👤 David E Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
C; C10; C10G; C10G11/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/0242; B01J8/025; B01J8/0257; C10G11/10; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00504; B01J2208/00796; B01J2208/00823; B01J2208/00831; B01J2208/0084
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) | 1924-08-08 | 1925-02-07 | 1925-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-08-08 | 1929-02-07 | 1929-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-08-08 | 1933-02-07 | 1933-08-09 | $7700.00 | Window Closed / Lapsed |