Patent US3327900A successfully refreshed from Google Patents.
US3327900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispensing device
Assignee: Greiner Scientific Corp
•
Filing: 1965-01-27
•
Granted: 1967-06-27
•
Expires: 1985-01-27
Abstract
No abstract record available.
Inventors
- 👤 George G Goda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:01
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0203; B01L3/0206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A LIQUID DISPENSING DEVICE COMPRISING A CYLINDRICAL BARREL HAVING AN UPWARD OPEN END AND A DOWNWARD OPEN END; AN UPPER PLUG MEMBER, HAVING AN OPENING THEREIN SUBSTANTIALLY CONCENTRIC WITH SAID UPWARD OPEN END OF SAID CYLINDRICAL BARREL, RETAINED PARTIALLY RECESSED IN SAID UPWARD OPEN END; A DOWNWARD PLUG MEMBER HAVING AN OPENING THEREIN, LIQUID TIGHTLY CIRCUMFERENTIALLY RETAINED AT THE DOWNWARD OPEN END OF SAID CYLINDRICAL BARREL; A PISTON RECIPROCABLY SLIDABLE WITHIN SAID BARREL, SAID PISTON BEING CIRCUMFERENTIALLY GROOVED, AN ELASTIC O-RING RETAINED AND RECESSED IN SAID GROOVE, A COMPACT RESILIENT LOW FRICTION SYNTHETIC PLASTIC SLIP RING SUBSTANTIALLY CONCENTRICALLY DISPOSED AROUND SAID O-RING RETAINED IN SAID GROOVE AND EXTENDING OUTWARDLY THEREFROM TO EFFECT LIQUID TIGHT SLIDABLE AND CONTACT WITH THE INTERNALLY TRAVELLED WALL OF SAID BARREL; AND ELONGATED MEMBER, ONE END THEREOF ENGAGING SAID PISTON AND MOVABLE THEREWITH, EXTENDING UPWARDLY THEREFROM; VARIABLE STOP MEANS WITHIN SAID BARREL UPWARD OF SAID PISTON TO LIMIT THE UPWARD TRAVEL THEREOF; CALIBRATED MEANS TO ADJUSTABLY POSITON SAID VARIABLE STOP
Claim 2
Dependent Claim
164 words
A LIQUID DISPENSING DEVICE COMPRISING A CYLINDRICAL BARREL HAVING AN UPWARD OPEN END AND A DOWNWARD OPEN END; AN UPPER PLUG MEMBER, HAVING AN OPENING THEREIN SUBSTANTIALLY CONCENTRIC WITH SAID UPWARD OPEN END OF SAID CYLINDRICAL BARREL, RETAINED PARTIALLY RECESSED IN SAID UPWARD OPEN END; A DOWNWARD PLUG MEMBER HAVING AN OPENING THEREIN, LIQUID TIGHTLY CIRCUMFERENTIALLY RETAINED AT THE DOWNWARD OPEN END OF SAID CYLINDRICAL BARREL; A PISTON RECIPROCABLY SLIDABLE WITHIN SAID BARREL, SAID PISTON BEING CIRCUMFERENTIALLY GROOVED, AN ELASTIC O-RING RETAINED AND RECESSED IN SAID GROOVE, A COMPACT RESILIENT LOW FRICTION SYNTHETIC PLASTIC SLIP RING SUBSTANTIALLY CONCENTRICALLY DISPOSED AROUND SAID O-RING RETAINED IN SAID GROOVE AND EXTENDING OUTWARDLY THEREFROM TO EFFECT LIQUID TIGHT SLIDABLE AND CONTACT WITH THE INTERNALLY TRAVELLED WALL OF SAID BARREL; AND ELONGATED MEMBER, ONE END THEREOF ENGAGING SAID PISTON AND MOVABLE THEREWITH, EXTENDING UPWARDLY THEREFROM; VARIABLE STOP MEANS WITHIN SAID BARREL UPWARD OF SAID PISTON TO LIMIT THE UPWARD TRAVEL THEREOF; CALIBRATED MEANS TO ADJUSTABLY POSITON SAID VARIABLE STOP
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |