US3100844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow indicating process
Assignee: International Business Machines Corp
•
Filing: 1960-12-23
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Granted: 1963-08-13
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Marcel J Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:50
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A PROCESS FOR MEASURING THE FRICTIONAL FORCES ARISING FROM THE IMPACT OF A FLUID STREAM STRIKING A LIGHT TRANSMITTING SURFACE, COMPRISING: INCORPORATING TRIBOLUMINESCENT PARTICLES IN THE FLUID; CAUSING THE FLUID STREAM WITH THE PARTICLES INCORPORATED THEREIN TO STRIKE THE SURFACE, THEREBY INDUCING LIGHT EMISSION FROM THE TRIBOLUMINESCENT PARTICLES; AND RECORDING THE EMITTED LIGHT PATTERNS THROUGH THE LIGHT TRANSMITTING SURFACE.
References Cited (Backward Citations)
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US2936371A
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US2984744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |