US2370031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving fibrous material and the material treated by such process
Assignee: BASF Schweiz AG
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Filing: 1940-01-15
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Granted: 1945-02-20
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Expires: 1960-01-15
Abstract
No abstract record available.
Inventors
- 👤 Graenacher Charles
- 👤 Sallmann Richard
- 👤 Albrecht Otto
- 👤 Frei Jost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/001; C09B44/00; C09B44/02; C09B51/00; C09B62/00; C09B62/44; C09B62/465; D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/322; D06M13/46; D06P; D06P1/00; D06P1/02; D06P1/12; D06P1/125; D06P1/44; D06P1/655; D06P1/66; D06P5/00; D06P5/22; D06P5/225
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) | 1948-02-20 | 1948-08-21 | 1949-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-02-20 | 1952-08-21 | 1953-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-02-20 | 1956-08-21 | 1957-02-20 | $7700.00 | Window Closed / Lapsed |