US2809123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous synthetic material of improved whiteness
Assignee: Novartis AG
•
Filing: 1956-02-20
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Granted: 1957-10-08
•
Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Keller Ernst
- 👤 Zweidler Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:37
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/04; D; D06; D06L; D06L4/00; D06L4/60; D06L4/614; D06L4/629
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
POLYACRYLONITRILE FIBRES HAVING ADSORBED THEREINTO A VERY SMALL QUANTITY OF A COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
16 words
POLYACRYLONITRILE FIBRES HAVING ADSORBED THEREINTO A VERY SMALL QUANTITY OF A COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2620282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |