Patent US1339418A successfully refreshed from Google Patents.
Patent US3228786A successfully refreshed from Google Patents.
US3228786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for impregnating fibrous sheets
Assignee: EIDP Inc
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Filing: 1962-07-13
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Granted: 1966-01-11
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Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 Emerson B Fitzgerald
- 👤 Francis E Jenkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:23
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/08; A43B23/16; D; D04; D04H; D04H1/00; D04H1/04; D04H1/06; D04H1/40; D04H1/58; D04H1/64; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS WHICH COMPRISES: (A) PREPARING A NON-WOVEN WEB OF FIBERS SAID WEB BEING CAPABLE OF SHRINKING 20-80% OF ITS PLANAR AREA AND HAVING A NEEDLE PATTERN ON ITS SURFACE, (B) IMPREGNATING SAID WEB WITH AN AQUEOUS DISPERSION OF A POLYMERIC KMATERIAL, (C) COAGULATING SAID AQUEOUS DISPERSION IMPREGRANT, AND (D) SUBJECTING SAID IMPREGNATED WEB TO AN ELEVATED TEMPERATURE WHICH CAUSES IT TO SHRINK 20-70% OF ITS PLANAR AREA BEFORE THE IMPREGNANT DRIES.
Claim 2
Dependent Claim
72 words
A PROCESS WHICH COMPRISES: (A) PREPARING A NON-WOVEN WEB OF FIBERS SAID WEB BEING CAPABLE OF SHRINKING 20-80% OF ITS PLANAR AREA AND HAVING A NEEDLE PATTERN ON ITS SURFACE, (B) IMPREGNATING SAID WEB WITH AN AQUEOUS DISPERSION OF A POLYMERIC KMATERIAL, (C) COAGULATING SAID AQUEOUS DISPERSION IMPREGRANT, AND (D) SUBJECTING SAID IMPREGNATED WEB TO AN ELEVATED TEMPERATURE WHICH CAUSES IT TO SHRINK 20-70% OF ITS PLANAR AREA BEFORE THE IMPREGNANT DRIES.
References Cited (Backward Citations)
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |