US2777428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus
Assignee: Sinclair Refining Co
•
Filing: 1953-04-01
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Granted: 1957-01-15
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Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Oliver F Campbell
- 👤 Decker William Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:33
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/1836; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1892; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/00079; B01J2208/00088; B01J2208/00106; B01J2208/00168; B01J2208/00176; B01J2208/00477; B01J2208/00495; B01J2208/00504; B01J2208/0053; Y; Y10; Y10S; Y10S261/00; Y10S261/09
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |