Patent US5858829A successfully refreshed from Google Patents.
Patent US3380910A successfully refreshed from Google Patents.
US3380910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of synthetic crude oil
Assignee: Chemical Construction Corp
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Filing: 1966-05-17
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Granted: 1968-04-30
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Expires: 1986-05-17
Abstract
No abstract record available.
Inventors
- 👤 Graham N Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/32; C01B3/34; C01B3/36; C01B3/50; C01B3/52; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/0475; C01B2203/0485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |