Patent US3457787A successfully refreshed from Google Patents.
US3457787A
Expired / Lapsed
US
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Method of and apparatus for the automatic observation and regeneration of devices for the sampling of waste gases
Assignee: Beteiligungs und Patentverwaltungs GmbH
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Filing: 1966-08-02
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Granted: 1969-07-29
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Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jurgen Maatsch
- 👤 Horst Achterfeld
- 👤 Hartmut Kamphaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:28
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; G; G01; G01N; G01N1/00; G01N1/02; G01N1/22
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |