US3203021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Applicator for thin layer chromatography
Assignee: APPLIED SCIENCE LAB Inc
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Filing: 1963-09-20
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Granted: 1965-08-31
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Pelick Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:58
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; G01N30/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A SPREADING DEVICE FOR USE IN THIN LAYER CHROMATOGRAPHY FOR SPREADING A THIN LAYER OF UNIFORM THICKNESS ON PLATES COMPISING IN COMBINATION, A PAR OF SIDE SUPPORT MEMBERS OF SUBSTANTIAL LENGTH DISPOSED IN SPACED RELATION, BASE SURFACES OF SUBSTANTIAL LENGTH ON SAID SIDE SUPPORT MEMBERS IN THE SAME PLANE ADAPTED FOR ENGAGING A FLAT SURFACE, A HANDLE MEMBER CONNECTED AT OPPOSITE ENDS BETWEEN SAID PAIR OF SIDE SUPPORT MEMBERS TO RIGIDLY CONNECT SAID SIDE SUPPORT MEMBERS IN SPACED RELATION, SAID HANDLE MEMBER CONNECTED A SUBSTANTIAL DISTANCE ABOVE SAID BASE SURFACES AND GENERALLY CENTRALLY OF THE LENGTH THEREOF, DOWNWARDLY SLOPING PARALLEL UPPER EDGES ON SAID PAIR OF SIDE SUPPORT MEMBERS, A
Claim 2
Dependent Claim
110 words
A SPREADING DEVICE FOR USE IN THIN LAYER CHROMATOGRAPHY FOR SPREADING A THIN LAYER OF UNIFORM THICKNESS ON PLATES COMPISING IN COMBINATION, A PAR OF SIDE SUPPORT MEMBERS OF SUBSTANTIAL LENGTH DISPOSED IN SPACED RELATION, BASE SURFACES OF SUBSTANTIAL LENGTH ON SAID SIDE SUPPORT MEMBERS IN THE SAME PLANE ADAPTED FOR ENGAGING A FLAT SURFACE, A HANDLE MEMBER CONNECTED AT OPPOSITE ENDS BETWEEN SAID PAIR OF SIDE SUPPORT MEMBERS TO RIGIDLY CONNECT SAID SIDE SUPPORT MEMBERS IN SPACED RELATION, SAID HANDLE MEMBER CONNECTED A SUBSTANTIAL DISTANCE ABOVE SAID BASE SURFACES AND GENERALLY CENTRALLY OF THE LENGTH THEREOF, DOWNWARDLY SLOPING PARALLEL UPPER EDGES ON SAID PAIR OF SIDE SUPPORT MEMBERS, A
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |