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US2844729A
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Device for the quantitative determination of gaseous infrared-absorbing material
Assignee: ABB Training Center GmbH and Co KG
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Filing: 1954-06-14
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Granted: 1958-07-22
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Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Winterling Karl Heinz
- 👤 Kowert Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:57
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB634453A
Cited
US2583221A
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US2673298A
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US2698390A
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US2681415A
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US2674696A
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US2688090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |