Patent US3200649A successfully refreshed from Google Patents.
US3200649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewer sampling system
Assignee: Weyerhaeuser Co
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Filing: 1962-12-21
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Granted: 1965-08-17
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Expires: 1982-12-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert T Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:23
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
AN APPARATUS FOR OBTAINING A SAMPLE FROM A SEWER CONDUIT, COMPRISING: A SAMPLE PIPE ADAPTED TO BE EXTENDED INT A CONDUIT SEWER AND BEING PROVIDED WITH OPENINGS ADJACENT THE LOWER END THEREOF, AN AIR CYLINDER OF A LARGER DIAMETER THAN SAID SAMPLE PIPE SPACED AXIALLY ABOVE SAID SAMPLE PIPE, A FIRST PISTON MEANS MOUNTED IN THE SAMPLE PIPE, A SECOND PISTON MEANS MOUNTED IN SAID AIR CYLINDER, SAID FIRST AND SAID SECOND PISTON MEANS BEING INTERCONNECTED BY A PISTON ROD WHEREBY SAID FIRST AND SECOND PISTON MEANS MOVE LONGITUDINALLY AWS A UNIT, SAID PISTON ROD PROVIDED WITH A CONDUIT EXTENDING BETWEEN THE UPPER END OF SAID SECOND A PISTON MEANS AND THE LOWER END OF SAID FIRST PISTON MEANS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |