US3343422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipette safety device
Assignee: Individual
•
Filing: 1965-08-12
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Granted: 1967-09-26
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Dwight G Mcsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; B01L3/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A MOUTH PROTECTIVE SAFETY DEVICE FOR USE WITH A PIPETTE WHEN EXTRACTING MEASURED QUANTITIES OF HAZARDOUS LIQUIDS COMPRISING: A SEPARABLE CONTAINER, PLIABLE MEANS DIVIDING SAID CONTAINER INTO TWO COMPARTMENTS, FIRST TUBULAR MEANS LEADING FROM ONE OF SAID COMPARTMENTS AND ADAPTED TO SERVE AS A MOUTHPIECE, SECOND TUBULAR MEANS LEADING FROM THE OTHER OF SAID COMPARTMENTS AND ADAPTED TO FRICTIONALLY ENGAGE A PIPETTE, WHEREBY UPON APPLICATION OF SUCTION ON SAID MOUTHPIECE SAID PLIABLE MEANS WILL MOVE IN SAID ONE COMPARTMENT TOWARD SAID MOUTHPIECE CAUSING A PARTIAL VACUUM IN SAID OTHER OF SAID COMPARTMENTS AND THEREBY PERMIT THE AMBIENT AIR PRESSURE TO FORCE A QUANTITY OF THE HAZARDOUS LIQUID INTO SAID PIPETTE WITHOUT ENDANGERING THE MOUTH TO THE LIQUID OR ITS FUMES.
Claim 2
Dependent Claim
120 words
A MOUTH PROTECTIVE SAFETY DEVICE FOR USE WITH A PIPETTE WHEN EXTRACTING MEASURED QUANTITIES OF HAZARDOUS LIQUIDS COMPRISING: A SEPARABLE CONTAINER, PLIABLE MEANS DIVIDING SAID CONTAINER INTO TWO COMPARTMENTS, FIRST TUBULAR MEANS LEADING FROM ONE OF SAID COMPARTMENTS AND ADAPTED TO SERVE AS A MOUTHPIECE, SECOND TUBULAR MEANS LEADING FROM THE OTHER OF SAID COMPARTMENTS AND ADAPTED TO FRICTIONALLY ENGAGE A PIPETTE, WHEREBY UPON APPLICATION OF SUCTION ON SAID MOUTHPIECE SAID PLIABLE MEANS WILL MOVE IN SAID ONE COMPARTMENT TOWARD SAID MOUTHPIECE CAUSING A PARTIAL VACUUM IN SAID OTHER OF SAID COMPARTMENTS AND THEREBY PERMIT THE AMBIENT AIR PRESSURE TO FORCE A QUANTITY OF THE HAZARDOUS LIQUID INTO SAID PIPETTE WITHOUT ENDANGERING THE MOUTH TO THE LIQUID OR ITS FUMES.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |