US3246067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet-spinning of aromatic polyester filament of high opacity
Assignee: EIDP Inc
•
Filing: 1962-05-14
•
Granted: 1966-04-12
•
Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Boyer Clarence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR PREPARING AROMATIC POLYESTER FILAMENTS OF HIGH OPACITY AND HAVING A SMOOTH, DENSE LUSTROUS EXTERIOR SURFACE COMPRISING EXTRUDING ABOUT A 15-30% SOLUTION OF A POLYMER HAVING REPEATING UNITS OF THE FORMULA
Claim 2
Dependent Claim
33 words
A PROCESS FOR PREPARING AROMATIC POLYESTER FILAMENTS OF HIGH OPACITY AND HAVING A SMOOTH, DENSE LUSTROUS EXTERIOR SURFACE COMPRISING EXTRUDING ABOUT A 15-30% SOLUTION OF A POLYMER HAVING REPEATING UNITS OF THE FORMULA
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |