US3577359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reticulating nylon materials
Assignee: FMC Corp
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Filing: 1968-02-05
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Granted: 1971-05-04
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Expires: 1988-02-05
Abstract
Abstract A FOAMED NYLON MATERIAL, FORMED OF CONTACTING CELLS WHICH PROVIDE A SKELETAL STRUCTURE OF INTERCONNECTED STRANDS WITH MEMBRANES PARTITIONING CONTIGUOUS CELLS AND JOINED TO THE SKELETAL STRUCTURE, IS EXPOSED TOA SOLUTION OF A STRONG ACID AND A NON-AQUEOUS SOLVENT TO REMOVE THE CELL MEMBRANES, LEAVING THE SKELETAL STRUCTURE OF NYLON MATERIAL WHICH IS SUITABLE, FOR EXAMPLE, AS A FILTER.
Inventors
- 👤 Theodore H Fairbanks
- 👤 Frank E Carevic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:29
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/38; Y; Y10; Y10S; Y10S521/00; Y10S521/908; Y10S521/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |