US2658349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant for the recovery of waste heat from combustible gases derived from chemical processes
Assignee: Aktiengesellschaft fuer Technische Studien
•
Filing: 1949-12-19
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Granted: 1953-11-10
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Expires: 1969-12-19
Abstract
No abstract record available.
Inventors
- 👤 Keller Curt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/72; C10J3/02; C10J3/20; C10J2300/00; C10J2300/09; C10J2300/0953; C10J2300/0956; C10J2300/16; C10J2300/1671; C10J2300/18; C10J2300/1861; C10J2300/1884; C10J2300/1892; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1813543A
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GB468287A
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US2203731A
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US2305785A
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CH202325A
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CH215485A
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GB546275A
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US2471755A
Cited
GB590208A
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GB602573A
Cited
US2513601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |