Patent US2734600A successfully refreshed from Google Patents.
Patent US3391570A successfully refreshed from Google Patents.
US3391570A
Expired / Lapsed
US
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Battery-operated pumping unit for gas analysis
Assignee: MSA Safety Inc
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Filing: 1965-04-02
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Granted: 1968-07-09
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Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Earl M Becker
- 👤 James H Bepler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:56
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0016; G01N1/00; G01N1/02; G01N1/22; G01N1/2273; G01N2001/2276; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87096; Y10T137/87121; Y10T137/87571; Y10T137/87652; Y10T137/8766; Y10T137/87668
Claims Analysis
Total Claims: 0
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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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |