US1896892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose derivatives and process of making same
Assignee: Novartis AG
•
Filing: 1930-01-23
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Granted: 1933-02-07
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Expires: 1950-01-23
Abstract
No abstract record available.
Inventors
- 👤 Robert Haller
- 👤 Alphonse Heckendorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:55
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/02; C08B11/04; C08B11/14; C08B15/00; C08B15/05; C08B15/06; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/16; D; D06; D06M; D06M13/00; D06M13/322; D06M13/35; D06M13/355; D06M13/358; D06M13/364; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6426; D06P1/6429; D06P1/649; D06P3/00; D06P3/58; D06P3/60; D06P3/66; D06P3/663; D06P3/68; D06P3/82; D06P3/8204; D06P3/829; D06P5/00; D06P5/22; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
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) | 1936-02-07 | 1936-08-08 | 1937-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-07 | 1940-08-08 | 1941-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-07 | 1944-08-08 | 1945-02-07 | $7700.00 | Window Closed / Lapsed |