US3537988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyperfiltration method of removing organic solute from aqueous solutions
Assignee: United States Atomic Energy Commission
•
Filing: 1968-02-07
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Granted: 1970-11-03
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Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Marcinkowsky
- 👤 James S Johnson
- 👤 Kurt A Kraus
- 👤 James R Kuppers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:47
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/14; B01D61/00; B01D61/02; B01D61/025; B01D69/12; B01D69/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3228876A
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US3170867A
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US3367787A
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US3310488A
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US3373056A
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US3331772A
Cited
US3449245A
Cited
US3344928A
Cited
US3462362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |