US3477899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bifilar polyamide yarns and filaments
Assignee: Bayer AG
•
Filing: 1965-05-18
•
Granted: 1969-11-11
•
Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Harry Kubitzek
- 👤 Otto Unger
- 👤 Gunter Nawrath
- 👤 Alfred Reichle
- 👤 Gunther Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:17
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; C; C08; C08G; C08G69/00; C08G69/42; D01D; D01D5/00; D01D5/22; D01D5/28; D01D5/30; Y; Y10; Y10S; Y10S57/00; Y10S57/905; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2989798A
Cited
US3039990A
Cited
US3182100A
Cited
US3225534A
Cited
US3216965A
Cited
US3328484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |