Patent US2983495A successfully refreshed from Google Patents.
US2983495A
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US
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Fractionating apparatus
Assignee: Marston Excelsior Ltd
•
Filing: 1958-03-07
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Granted: 1961-05-09
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Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Shuttleworth Norman Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:14
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/26; B01D3/16; B01D3/24; B01D3/28; B01D47/00; B01J; B01J19/00; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/3221; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32237; B01J2219/32241; B01J2219/324; B01J2219/32408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1169764A
Cited
US1701978A
Cited
DE684870C
Cited
DE678100C
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US2540091A
Cited
US2681269A
Cited
US2805845A
Cited
US2885195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |