US3591805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin layer chromatographic plate having preadjusted spectral transmissivity and emissivity and preadjusted opaque and nonopaque intervals
Assignee: ABI ANALYTICAL Inc
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Filing: 1969-02-20
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Granted: 1971-07-06
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Expires: 1989-02-20
Abstract
Abstract A chromatographic plate wherein the spectral transmission is preadjusted and which is provided with preadjusted transparent and opaque intervals.
Inventors
- 👤 Dietmar M Schoeffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:27
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
The invention of claim 1 wherein the opaque strips are formed of photographic material and are affixed to the first surface of the thin plate.
Claim 2
Dependent Claim
15 words
The invention of claim 1 wherein the thin plate contains optical filter material embedded therein.
Claim 3
Dependent Claim
19 words
The invention of claim 1 wherein the opaque strips are formed of rigid material such as glass or plastic.
Claim 4
Dependent Claim
19 words
The invention of claim 1 wherein the opaque strips are affixed to the first surface of the thin plate.
Claim 5
Dependent Claim
73 words
The invention of claim 1 including: a thin plate, optical filter affixed to the first surface of the thin plate such that the adsorbent layer is between the thin plate and the thin plate, optical filter; and access means associated with the thin plate, optical filter to permit ready access to a portion of the first surface of the thin plate to apply a sample and/or a solvent to the thin adsorbent layer.
Claim 6
Dependent Claim
21 words
The invention of claim 6 including a second, thin plate, optical filter affixed to the second surface of the thin plate.
Claim 7
Dependent Claim
44 words
The invention of claim 6 wherein the access means associated with the thin plate, optical filter comprises the end of the thin plate, optical being displaced from the end of the thin plate to thereby expose a small portion of the first surface thereof.
Claim 8
Dependent Claim
27 words
The invention of claim 6 wherein the access means associated with the thin plate, optical filter comprises a plurality of openings in the thin plate, optical filter.
Claim 9
Dependent Claim
19 words
The invention of claim 6 including means for applying an electrical voltage across the width of the thin plate.
Claim 10
Dependent Claim
45 words
The invention of claim 10 wherein the access means associated with the thin plate, optical filter comprises the end of the thin plate, optical filter being displaced from the end of the thin plate to thereby expose a small portion of the first surface thereof.
Claim 11
Dependent Claim
27 words
The invention of claim 10 wherein the access means associated with the thin plate, optical filter comprises a plurality of openings in the thin plate, optical filter.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |