Patent US2156455A successfully refreshed from Google Patents.
US2156455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of felt
Assignee: IG Farbenindustrie AG
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Filing: 1936-05-23
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Granted: 1939-05-02
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Expires: 1956-05-23
Abstract
No abstract record available.
Inventors
- 👤 Kleine Johannes
- 👤 Brennecke Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:17
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4266; D04H1/04; D04H1/08; D04H1/425; D04H1/4258; D04H1/4274; D04H1/4282; D04H1/70; D04H1/74; D06; D06P; D06P1/00; D06P1/0096; D06P3/00; D06P3/82; D06P3/8204; D06P3/8214; D06P3/8219; D06P3/8271; D06P3/02; D06P3/04; D06P3/14; D06P3/16; Y; Y10; Y10S; Y10S264/00; Y10S264/75; Y10S524/00; Y10S524/925
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |