Patent US3873274A successfully refreshed from Google Patents.
US3873274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titrator
Assignee: Merck Patent GmbH
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Filing: 1973-02-02
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Granted: 1975-03-25
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Expires: 1993-02-02
Abstract
Abstract A titrating device adapted to be removably air-tight fitted onto a bottle of titrating liquid, comprising a graduated plunger-type syringe, for mounting externally on the bottle by a seal providing air-tight communication with a burette of comparable capacity as the syringe, for mounting in the bottle, so that titrating liquid in the bottle is metered into the burette and does not contact the syringe when the plunger is withdrawn while the tip of the burette is below the surface of the titrating liquid.
Inventors
- 👤 Karlheinz Neisius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0203; B01L3/0206
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A TITRATING DEVICE COMPRISING A CONTAINER FOR A LIQUID TO BE TITRATED, SAID CONTAINER HAVING AN OPENING THROUGH A NECK BEARING EXTERNAL THREADS, SEPARABLE MEANS FOR WITHDRAWING SAID LIQUID FROM SAID CONTAINER INCLUDING A BURETTE FOR DEPENDING INTO SAID CONTAINER, A GRADUATED PLUNGER-TYPE SYRINGE FOR STANDING ABOVE SAID CONTAINER, AND HOLLOW SEALING MEANS INTERCONNECTING SAID BURETTE AND SAID SYRINGE IN AIR-TIGHT COMMUNICATION, THE VOLUME OF SAID SYRINGE BEING NOT SUBSTANTIALLY GREATER THAN THE VOLUME OF SAID BURETTE, AND SAID SEALING MEANS INCLUDING AN UPWARDLY EXTENDING TUBULAR PORTION HAVING AN INTEGRAL ANNULAR RING ON THE EXTERNAL SURFACE THEREOF, AND A SCREW CAP FOR MOUNTING ON SAID THREADED NECK AND HAVING AN APERTURE THEREIN FOR RECEIVING SAID TUBULAR PORTION THERETHROUGH, SAID SCREW CAP INTERACTING WITH THE UPPER SURFACE OF SAID ANNULAR RING FOR FORCING THE LOWER SURFACE OF SAID RING AGAINST SAID NECK FOR SEALING SAID SEPARABLE MEANS WITH SAID CONTAINER.
Claim 2
Dependent Claim
149 words
A TITRATING DEVICE COMPRISING A CONTAINER FOR A LIQUID TO BE TITRATED, SAID CONTAINER HAVING AN OPENING THROUGH A NECK BEARING EXTERNAL THREADS, SEPARABLE MEANS FOR WITHDRAWING SAID LIQUID FROM SAID CONTAINER INCLUDING A BURETTE FOR DEPENDING INTO SAID CONTAINER, A GRADUATED PLUNGER-TYPE SYRINGE FOR STANDING ABOVE SAID CONTAINER, AND HOLLOW SEALING MEANS INTERCONNECTING SAID BURETTE AND SAID SYRINGE IN AIR-TIGHT COMMUNICATION, THE VOLUME OF SAID SYRINGE BEING NOT SUBSTANTIALLY GREATER THAN THE VOLUME OF SAID BURETTE, AND SAID SEALING MEANS INCLUDING AN UPWARDLY EXTENDING TUBULAR PORTION HAVING AN INTEGRAL ANNULAR RING ON THE EXTERNAL SURFACE THEREOF, AND A SCREW CAP FOR MOUNTING ON SAID THREADED NECK AND HAVING AN APERTURE THEREIN FOR RECEIVING SAID TUBULAR PORTION THERETHROUGH, SAID SCREW CAP INTERACTING WITH THE UPPER SURFACE OF SAID ANNULAR RING FOR FORCING THE LOWER SURFACE OF SAID RING AGAINST SAID NECK FOR SEALING SAID SEPARABLE MEANS WITH SAID CONTAINER.
Claim 3
Dependent Claim
50 words
The titrating device of claim 1 wherein said burette has a barrel in the form of a right circular cylinder and wherein said container includes an annular collar mounted in the neck thereof for scraping liquid from the surface of said burette as said burette is separated from said container.
Claim 4
Dependent Claim
55 words
A titrating device according to claim 1 wherein said syringe includes a cylindrical barrel portion and wherein said device includes a transparent plastic sleeve surrounding the barrel of the syringe and wherein said barrel and said surrounding sleeve are inserted into said upwardly extending tubular portion of said sealing means in an air-tight friction fit.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |