Patent US2494098A successfully refreshed from Google Patents.
US2494098A
Expired / Lapsed
US
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Automatically controlled recovery of heat and so2 gas from relief gases and waste liquor
Assignee: American Heat Reclaiming Corp
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Filing: 1943-06-22
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Granted: 1950-01-10
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Expires: 1963-06-22
Abstract
No abstract record available.
Inventors
- 👤 Lockman Carl Johan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/06; C; C01; C01B; C01B17/00; C01B17/48; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1645754A
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US1780638A
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US1908615A
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US1955057A
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US2029360A
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US2221066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |