US833936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of valuable gases in the sulfite process.
Assignee: Individual
•
Filing: 1906-01-08
•
Granted: 1906-10-23
•
Expires: 1926-01-08
Abstract
No abstract record available.
Inventors
- 👤 Einar Morterud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:23
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1909-10-22 | 1910-04-23 | 1910-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-10-22 | 1914-04-23 | 1914-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-10-22 | 1918-04-23 | 1918-10-23 | $7700.00 | Window Closed / Lapsed |