US3519477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing cellulosic and acrylic staple fiber yarns with acrylonitrile/acrylic acid copolymer
Assignee: BASF SE
•
Filing: 1967-01-31
•
Granted: 1970-07-07
•
Expires: 1987-01-31
Abstract
No abstract record available.
Inventors
- 👤 Hans Wolf
- 👤 Herbert Spoor
- 👤 Wilhelm Ruemens
- 👤 Heinz Pohlemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:15
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/31
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2819189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |