Patent US3223487A successfully refreshed from Google Patents.
US3223487A
Expired / Lapsed
US
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Gas detection and pump therefor
Assignee: Individual
•
Filing: 1962-08-15
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Granted: 1965-12-14
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Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 Grosskopf Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:34
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/24; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A HAND OPERATABLE GAS DETECTION PUMP FOR DETERMINING CONSTITUENTS IN GASES BY DRAWING THE DESIRED VOLUME OF GAS TO BE ANALYZED THROUGH A DETECTOR TUBE HAVING AN INSIDE DIAMETER OF ABOUT 5 TO 8 MILLIMETERS, THE IMPROVEMENT COMPRISING SPRING-ACTUATED BELLOWS MEANS FOR DRAWING THE DESIRED VOLUME OF GAS THROUGH SAID DETECTOR TUBE AT A VOLUME GAS FLOW RATE OF ABOUT FROM 60 TO 100 LITERS PER HOUR, AND SAID TUBE HAVING A GAS SUPPLY RESISTANCE OF 100 TORR MEASURED AT ONE LITER PER MINUTE.
Claim 2
Dependent Claim
85 words
IN A HAND OPERATABLE GAS DETECTION PUMP FOR DETERMINING CONSTITUENTS IN GASES BY DRAWING THE DESIRED VOLUME OF GAS TO BE ANALYZED THROUGH A DETECTOR TUBE HAVING AN INSIDE DIAMETER OF ABOUT 5 TO 8 MILLIMETERS, THE IMPROVEMENT COMPRISING SPRING-ACTUATED BELLOWS MEANS FOR DRAWING THE DESIRED VOLUME OF GAS THROUGH SAID DETECTOR TUBE AT A VOLUME GAS FLOW RATE OF ABOUT FROM 60 TO 100 LITERS PER HOUR, AND SAID TUBE HAVING A GAS SUPPLY RESISTANCE OF 100 TORR MEASURED AT ONE LITER PER MINUTE.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |