US3353920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High severity pyrolysis apparatus
Assignee: Linde GmbH
•
Filing: 1964-11-13
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Granted: 1967-11-21
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Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Maurice R Kitzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2090504A
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US2208123A
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US2263557A
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US2638879A
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US2736685A
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US2904502A
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US2994724A
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US2917564A
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US3112880A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |