US3303043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatoplate for use in thin layer chromatography
Assignee: Merck KGaA
•
Filing: 1963-03-06
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Granted: 1967-02-07
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Halpaap Herbert
- 👤 Reich Walter
- 👤 Rossler Hubert
- 👤 Waldi Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:48
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/103; B01J20/06; B01J20/08; B01J20/14; B01J20/28; B01J20/28002; B01J20/28004; B01J20/281; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; G01N30/93; B01J2220/00; B01J2220/40; B01J2220/49; B01J2220/50; B01J2220/54; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A CHROMATOSTRIP CONSISTING ESSENTIALLY OF A FLAT, SMOOTH SUPPORT AND SUPERIMPOSED THEREON A COATING OF A THICKNESS OF ABOUT 50$ TO ABOUT 4 MM. OF AN ADSORBENT COMPOSITION COMPRISING IN PERCENT BY WEIGHT, 98-70% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, SILICEOUS EARTH AND ALUMINUM OXIDE, SAID MEMBER HAVING A PARTICLE SIZE IN THE RANGE OF ABOUT 2$ TO ABOUT 60$, AND 2-30% OF SILICON DIOXIDE HAVING A PARTICLE SIZE OF 3-50M$.
Claim 2
Dependent Claim
76 words
A CHROMATOSTRIP CONSISTING ESSENTIALLY OF A FLAT, SMOOTH SUPPORT AND SUPERIMPOSED THEREON A COATING OF A THICKNESS OF ABOUT 50$ TO ABOUT 4 MM. OF AN ADSORBENT COMPOSITION COMPRISING IN PERCENT BY WEIGHT, 98-70% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA GEL, SILICEOUS EARTH AND ALUMINUM OXIDE, SAID MEMBER HAVING A PARTICLE SIZE IN THE RANGE OF ABOUT 2$ TO ABOUT 60$, AND 2-30% OF SILICON DIOXIDE HAVING A PARTICLE SIZE OF 3-50M$.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |