US2494098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically controlled recovery of heat and so2 gas from relief gases and waste liquor
Assignee: American Heat Reclaiming Corp
•
Filing: 1943-06-22
•
Granted: 1950-01-10
•
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 06:09
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE252412C
Cited
US833936A
Cited
US1327666A
Cited
US1670156A
Cited
US1699556A
Cited
US1703745A
Cited
US1645754A
Cited
US1780638A
Cited
US1908615A
Cited
US1955057A
Cited
US2029360A
Cited
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 |