US2368690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the improvement of the properties of artificial masses and fibers manufactured from proteinlike substances
Assignee: Firm Of Sandoz A G
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Filing: 1939-11-06
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Granted: 1945-02-06
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Expires: 1959-11-06
Abstract
No abstract record available.
Inventors
- 👤 Tschudin Walter Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/046; C; C08; C08L; C08L89/00; C08L89/005; D01; D01F; D01F4/00; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/24; D06M11/32; D06M11/36; D06M11/48
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) | 1948-02-06 | 1948-08-07 | 1949-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-02-06 | 1952-08-07 | 1953-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-02-06 | 1956-08-07 | 1957-02-06 | $7700.00 | Window Closed / Lapsed |