US2156160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin molding compound
Assignee: NORTHWOOD CHEMICAL Co
•
Filing: 1938-05-17
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Granted: 1939-04-25
•
Expires: 1958-05-17
Abstract
No abstract record available.
Inventors
- 👤 Edgar T Olson
- 👤 Richard H Plow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:05
CPC Classifications
C; C08; C08H; C08H8/00; C08H6/00; C08L; C08L97/00; C08L97/005; C08L97/02
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) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |