Patent US2728232A successfully refreshed from Google Patents.
US2728232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipette filling bulb
Assignee: RICHARD L COSTELLO
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Filing: 1953-07-13
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Granted: 1955-12-27
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Expires: 1973-07-13
Abstract
No abstract record available.
Inventors
- 👤 John F Bremmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:46
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B01L3/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN COMBINATION, A PIPETTE, A COLLAPSIBLE ELASTIC BULB HAVING AN INTEGRAL ATTACHING NECK APPRECIABLY LONG AND SEPARABLY CONNECTED TO ONE END OF SAID PIPETTE, SAID NECK HAVING A LENGTHWISE PASSAGE AND A LATERAL FINGER-CONTROLLED AIR VENT OPENING THROUGH ONE SIDE AND COMMUNICATING WITH SAID PASSAGE, SAID PASSAGE BEING ENLARGED IN DIAMETER AT ITS OUTER END AND THUS PROVIDING A SHOULDERED SOCKET, ONE END OF SAID PIPETTE TELESCOPING INTO SAID SOCKET.
Claim 2
Dependent Claim
70 words
IN COMBINATION, A PIPETTE, A COLLAPSIBLE ELASTIC BULB HAVING AN INTEGRAL ATTACHING NECK APPRECIABLY LONG AND SEPARABLY CONNECTED TO ONE END OF SAID PIPETTE, SAID NECK HAVING A LENGTHWISE PASSAGE AND A LATERAL FINGER-CONTROLLED AIR VENT OPENING THROUGH ONE SIDE AND COMMUNICATING WITH SAID PASSAGE, SAID PASSAGE BEING ENLARGED IN DIAMETER AT ITS OUTER END AND THUS PROVIDING A SHOULDERED SOCKET, ONE END OF SAID PIPETTE TELESCOPING INTO SAID SOCKET.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |