US3322611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous fibers and processes of preparing same
Assignee: EIDP Inc
•
Filing: 1962-10-19
•
Granted: 1967-05-30
•
Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
- 👤 Stevenson Halsey Bidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/298; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN OPAQUE FILAMENT OF SMALL CROSS-SECTION COMPOSED OF A HYDROPHOBIC DIMETHYLFORMAMIDE-SOLUBLE VINYL CHLORIDE ADDITION POLYMER CONTAINING A MAJOR AMOUNT OF VINYL CHLORIDE, SAID FILAMENT (A) HAVING AN OPEN CELL STRUCTURE CHARACTERIZED BY MICROSCOPIC OPEN CELL VOIDS INTERCOMMUNICATING AND COMMUNICATING WITH THE SURFACE OF THE FILAMENT, AND (B) HAVING AN APPARENT DENSITY OF 0.15 TO 0.35.
Claim 2
Dependent Claim
55 words
AN OPAQUE FILAMENT OF SMALL CROSS-SECTION COMPOSED OF A HYDROPHOBIC DIMETHYLFORMAMIDE-SOLUBLE VINYL CHLORIDE ADDITION POLYMER CONTAINING A MAJOR AMOUNT OF VINYL CHLORIDE, SAID FILAMENT (A) HAVING AN OPEN CELL STRUCTURE CHARACTERIZED BY MICROSCOPIC OPEN CELL VOIDS INTERCOMMUNICATING AND COMMUNICATING WITH THE SURFACE OF THE FILAMENT, AND (B) HAVING AN APPARENT DENSITY OF 0.15 TO 0.35.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |