US3340085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas chromatographic separating material
Assignee: Applied Biosystems Inc
•
Filing: 1963-10-21
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Granted: 1967-09-05
•
Expires: 1983-10-21
Abstract
No abstract record available.
Inventors
- 👤 Halasz Istvan
- 👤 Horvath Csaba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:52
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/02; B01J20/06; B01J20/20; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/28016; B01J20/28019; B01J20/28054; B01J20/28057; B01J20/282; B01J20/30; B01J20/3078; B01J20/3092; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; B01J20/324; B01J20/3291; B01J20/3293; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56; B01J2220/00; B01J2220/50; B01J2220/54; B01J2220/58; Y; Y10; Y10S; Y10S73/00; Y10S73/08; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
PROCESS OF PRODUCING A PACKING MATERIAL FR CHROMATOGRAPHIC COLUMNS, WHICH COMPRISES COATING INERT GASIMPERVIOUS CORES WITH POROUS ADSORPTIVE SURFACE LAYERS CONSISTING ESSENTIALLY OF PARTICLES OF ACTIVELY ADSORBENT SOLID MATERIAL AND THEREAFTER IMPROVING THE UNIFORMITY OF THE COATING LAYERS ON THE COATED CORES BY SUBJECTING THEM TO A ROLLING AFTERTREATMENT IN A GRANULATING DRUM OR GRANULATING DISK IN WHICH ROLLING OPERATION ADDITIONAL POWDEROUS ACTIVELY ADSORBENT SOLID MATERIAL IS INCORPORATED INTO SAID LAYER.
Claim 2
Dependent Claim
71 words
PROCESS OF PRODUCING A PACKING MATERIAL FR CHROMATOGRAPHIC COLUMNS, WHICH COMPRISES COATING INERT GASIMPERVIOUS CORES WITH POROUS ADSORPTIVE SURFACE LAYERS CONSISTING ESSENTIALLY OF PARTICLES OF ACTIVELY ADSORBENT SOLID MATERIAL AND THEREAFTER IMPROVING THE UNIFORMITY OF THE COATING LAYERS ON THE COATED CORES BY SUBJECTING THEM TO A ROLLING AFTERTREATMENT IN A GRANULATING DRUM OR GRANULATING DISK IN WHICH ROLLING OPERATION ADDITIONAL POWDEROUS ACTIVELY ADSORBENT SOLID MATERIAL IS INCORPORATED INTO SAID LAYER.
References Cited (Backward Citations)
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Cited
US2788297A
Cited
US3014815A
Cited
US3048029A
Cited
US3005514A
Cited
US3232782A
Cited
US3273315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |