US2541149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw roll mechanism for hot stretching of artificial filaments
Assignee: EIDP Inc
•
Filing: 1945-08-29
•
Granted: 1951-02-13
•
Expires: 1965-08-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Birkenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:27
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/225; Y; Y10; Y10S; Y10S425/00; Y10S425/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1977611A
Cited
US2002996A
Cited
US2020057A
Cited
DE628569C
Cited
US2254251A
Cited
US2468666A
Cited
US2440226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |