US3320428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive apparatus for detecting solid particles suspended in liquid
Assignee: BP PLC
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Filing: 1964-04-15
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Granted: 1967-05-16
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Wagstaffe Alan
- 👤 Charnock David John
- 👤 Beynon Leslie Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:02
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN APPARATUS FOR DETECTING MINOR AMOUNTS OF SOLID MATERIAL SUSPENDED IN A LIQUID, COMPRISING A LINE FOR THE LIQUID TO BE TESTED LEADING THROUGH A LIGHT SCATTERING ENCLOSURE, MEANS INCLUDING A SOURCE OF LIGHT FOR PRODUCING AND PASSING A PARALLEL BEAM OF LIGHT THROUGH THE SCATTERING ENCLOSURE, AND MEANS FOR MEASURING THE LIGHT SCATTERED IN SAID ENCLOSURE, SAID MEASURING MEANS COMPRISING THREE PHOTO-ELECTRIC CELLS ATTACHED TO THE LIGHT SCATTERING ENCLOSURE BUT OUT OF THE DIRECT PATH OF SAID LIGHT BEAM, A FIRST AND SECOND OF SAID CELLS BEING DISPOSED AT
Claim 2
Independent Claim
90 words
AN APPARATUS FOR DETECTING MINOR AMOUNTS OF SOLID MATERIAL SUSPENDED IN A LIQUID, COMPRISING A LINE FOR THE LIQUID TO BE TESTED LEADING THROUGH A LIGHT SCATTERING ENCLOSURE, MEANS INCLUDING A SOURCE OF LIGHT FOR PRODUCING AND PASSING A PARALLEL BEAM OF LIGHT THROUGH THE SCATTERING ENCLOSURE, AND MEANS FOR MEASURING THE LIGHT SCATTERED IN SAID ENCLOSURE, SAID MEASURING MEANS COMPRISING THREE PHOTO-ELECTRIC CELLS ATTACHED TO THE LIGHT SCATTERING ENCLOSURE BUT OUT OF THE DIRECT PATH OF SAID LIGHT BEAM, A FIRST AND SECOND OF SAID CELLS BEING DISPOSED AT
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |