US3277694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscometer
Assignee: Cannon Instrument Co
•
Filing: 1965-08-20
•
Granted: 1966-10-11
•
Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Elizabeth L Cannon
- 👤 Robert E Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:52
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN AN ALL-GLASS U-SHAPED PRESSURE-DRIVEN CAPILLARY VISCOMETER FOR THE DIRECT MEASUREMENT OF ABSOLUTE VISCOSITY COMPRISING A PAIR OF ARMS EACH OPEN AT THE UPPER ENDS THEREOF AND IN COMMUNICATION WITH EACH OTHER AT THEIR LOWER ENDS, A TIMING BULB IN ONE ARM, A LENGTH OF CAPILLARY TUBE OF 0.1 TO 5 MM. INTERNAL DIAMETER IN SAID ONE ARM BELOW SAID BULB, A RESERVOIR IN THE LOWER PART OF THE OTHER ARM, AND A TUBE CONNECTING SAID RESERVOIR AND SAID CAPILLARY TUBE, THE IMPROVEMENT COMPRISING A SECOND TIMING BULB DISPOSED ABOVE AND SPACED FROM SAID FIRST BULB AND BEING A GREATER VOLUME THAN SAID FIRST BULB, SAID FIRST TIMING BULB BEING CONNECTED TO ATMOSPHERE THROUGH SAID SECOND TIMING BULB, SAID CAPILLARY
Claim 2
Dependent Claim
120 words
IN AN ALL-GLASS U-SHAPED PRESSURE-DRIVEN CAPILLARY VISCOMETER FOR THE DIRECT MEASUREMENT OF ABSOLUTE VISCOSITY COMPRISING A PAIR OF ARMS EACH OPEN AT THE UPPER ENDS THEREOF AND IN COMMUNICATION WITH EACH OTHER AT THEIR LOWER ENDS, A TIMING BULB IN ONE ARM, A LENGTH OF CAPILLARY TUBE OF 0.1 TO 5 MM. INTERNAL DIAMETER IN SAID ONE ARM BELOW SAID BULB, A RESERVOIR IN THE LOWER PART OF THE OTHER ARM, AND A TUBE CONNECTING SAID RESERVOIR AND SAID CAPILLARY TUBE, THE IMPROVEMENT COMPRISING A SECOND TIMING BULB DISPOSED ABOVE AND SPACED FROM SAID FIRST BULB AND BEING A GREATER VOLUME THAN SAID FIRST BULB, SAID FIRST TIMING BULB BEING CONNECTED TO ATMOSPHERE THROUGH SAID SECOND TIMING BULB, SAID CAPILLARY
References Cited (Backward Citations)
US1467461A
Cited
US2805570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |