US3394053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionator control system with material balance computer and feedback control
Assignee: Schneider Electric Systems USA Inc
•
Filing: 1965-02-02
•
Granted: 1968-07-23
•
Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Shinskey Francis Gregway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:52
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4244; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2767133A
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US2900312A
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US3085153A
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US3130187A
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US3292852A
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US3325377A
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US3309288A
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US3294648A
Cited
US3361646A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |