US3493497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatography
Assignee: Individual
•
Filing: 1966-05-10
•
Granted: 1970-02-03
•
Expires: 1986-05-10
Abstract
No abstract record available.
Inventors
- 👤 Victor Pretorius
- 👤 Hans Helmut Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1807; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0242; B01D11/04; B01D11/0426; B01D11/043; B01D15/16; B01D15/163; B01J; B01J19/00; B01J19/32; G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045; G01N27/416; G01N27/447; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/26; G01N30/28; G01N30/34; G01N30/38; G01N30/50; G01N30/56; G01N30/58; G01N30/62; G01N30/64; G01N30/84; B01D15/161; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32231; B01J2219/32286; B01J2219/32296; G01N30/32; G01N2030/324; G01N30/52; G01N2030/524; G01N30/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2743818A
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US2925330A
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US2989443A
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US2861651A
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US3173862A
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US3230167A
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US3338031A
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US3298527A
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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) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |