US2417346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradation treatment of lignin material
Assignee: Sulphite Products Corp
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Filing: 1943-10-23
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Granted: 1947-03-11
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Expires: 1963-10-23
Abstract
No abstract record available.
Inventors
- 👤 Brauns Friedrich Emil
- 👤 Irwin A Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:30
CPC Classifications
C; C08; C08H; C08H6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-10 | 1950-09-09 | 1951-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-10 | 1954-09-09 | 1955-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-10 | 1958-09-09 | 1959-03-11 | $7700.00 | Window Closed / Lapsed |