US2256034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial leather substitute
Assignee: Carl Freudenberg KG
•
Filing: 1938-02-26
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Granted: 1941-09-16
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Expires: 1958-02-26
Abstract
No abstract record available.
Inventors
- 👤 Nottebohm Carl Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74; D04H1/40; D04H1/58; D04H1/587; D04H1/64; D04H1/645; D06; D06N; D06N3/00; D06N3/04; D06N3/10; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
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) | 1944-09-15 | 1945-03-17 | 1945-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-15 | 1949-03-17 | 1949-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-15 | 1953-03-17 | 1953-09-16 | $7700.00 | Window Closed / Lapsed |