US3855846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample applicator
Assignee: Marine Colloids Inc
•
Filing: 1972-04-07
•
Granted: 1974-12-24
•
Expires: 1992-04-07
Abstract
Abstract An applicator for applying aqueous test solutions to a hydrated gel layer for subjection to electrophoretic or chromatographic procedures is in the form of a stiff resilient non-absorbent polymeric sheet having a thickness from 3 to 125 mils and having a hydrophilic surface. The thin film of test solution picked up by the sample holder when dipped in the solution is transferred with precise control of location by pressing the edge of the applicator into the gel.
Inventors
- 👤 R Forget
- 👤 C Saravis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44743; G01N30/00; G01N30/90; G01N30/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
AN APPLICATOR FOR APPLYING SAMPLES OF AQUEOUS TEST SOLUTION TO A HYDEATED GEL FILM FOR SUBJECTION TO ELECTROPHORETIC OR CHROMATOGRAPHIC PROCEDURES COMPRISING A PLURALITY OF SPACED APART STIFF RESILENT NON-ABSORBENT POLYMERIC SHEET SAPLE HOLDERS HAVING A THICKNESS FROM 3 TO 125 MILS AND HAVING A HYDROPHILIC SURFACE EACH SAMPLE HOLDER HAVING AN UNINTERRUPTED STRAIGHT FLAT BOTTOM.
Claim 2
Dependent Claim
56 words
AN APPLICATOR FOR APPLYING SAMPLES OF AQUEOUS TEST SOLUTION TO A HYDEATED GEL FILM FOR SUBJECTION TO ELECTROPHORETIC OR CHROMATOGRAPHIC PROCEDURES COMPRISING A PLURALITY OF SPACED APART STIFF RESILENT NON-ABSORBENT POLYMERIC SHEET SAPLE HOLDERS HAVING A THICKNESS FROM 3 TO 125 MILS AND HAVING A HYDROPHILIC SURFACE EACH SAMPLE HOLDER HAVING AN UNINTERRUPTED STRAIGHT FLAT BOTTOM.
Claim 3
Dependent Claim
19 words
An applicator as claimed in claim 1 comprising in addition means for removably mounting said applicator upon a handle.
Claim 4
Dependent Claim
22 words
An applicator as claimed in claim 2 in which said means comprises a layer of pressure sensitive adhesive bonded to said sheet.
Claim 5
Dependent Claim
36 words
An applicator as claimed in claim 1 in which all of the sample holders are integral parts of a single sheet and all have their straight edges aligned with each other for contacting said gel film.
Claim 6
Dependent Claim
78 words
An applicator for applying a sample of aqueous test solution to a hydrated gel film supported on a rigid support member for subjection to electrophoretic or chromatographic procedures comprising a stiff resilient non-porous sheet of polymeric material having a thickness from 3 to 10 mils and having a hydrophilic surface on which water spreads to a thin film, the bottom edge of said sheet being straight, flat, and free from grooves and a handle connected to said sheet.
Claim 7
Dependent Claim
78 words
An applicator for applying a sample of aqueous test solution to a hydrated gel film supported on a rigid support member for subjection to electrophoretic or chromatographic procedures comprising a stiff resilient non-porous sheet of polymeric material having a thickness from 3 to 10 mils and having a hydrophilic surface on which water spreads to a thin film, the bottom edge of said sheet being straight, flat, and free from grooves and a handle connected to said sheet.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |