US2429102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of lignin material
Assignee: Mead Corp
•
Filing: 1943-02-13
•
Granted: 1947-10-14
•
Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 Harry F Lewis
- 👤 Friedrich E Brauns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
C; C08; C08H; C08H6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922690A
Cited
US2099717A
Cited
US2228976A
Cited
US2156160A
Cited
US2209289A
Cited
US2265181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |