US3286007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing a polyolefin fiber-containing non-woven fabric
Assignee: Ludlow Corp
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Filing: 1965-06-25
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Granted: 1966-11-15
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Wilkie Robert Campbell
- 👤 Hoyle Albert Gerard
- 👤 Roche Leo John De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:15
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A PROCESS COMPRISING THE STEPS OF: (A) FORMING A NON-WOVEN WEB THE FIBER CONTENT OF WHICH CONSISTS OF AT LEAST 25 WEIGHT PERCENT OF A THERMOPLASTIC POLYMER FIBER UNIFORMLY DISTRIBUTED THERETHROUGH; (B) HEATING ONE SURFACE OF SAID WEB, SMOOTHING, COMPACTING AND DENSIFYING THE FIBER CONTENT THEREOF AND FUSING THE THERMOPLASTIC FIBERS, AT SAID SURFACE INTO A LOOSE POROUS FIBER MATRIX, WHILE LEAVING THE BALANCE OF THE FIBERS IN THE WEB IN A RELATIVELY EXPANDED, INTERLOCKED BUT UNBONDED STATE; (C) DISTRIBUTING A THERMO-RESPONSIVE RESIN BINDER WITHIN THE INTERSTICES OF SAID WEB, SAID RESIN BINDER HAVING A MELTING POINT BELOW THE MELTING POINT OF SAID THERMOPLASTIC POLYMER FIBER; (D) HEATING SAID WEB TO A TEMPERATURE SUFFICIENT TO MELT SAID RESIN BINDER BUT BELOW THAT TEMPERATURE AT WHICH SAID THERMOPLASTIC POLYMER FIBER MELTS; AND (E) COMPACTING SAID WEB TO IMPRESS THE FIBERS THEREOF INTO SAID RESIN BINDER WHILE SIMULTANEOUSLY COOLING SAID WEB TIO SOLIDIFY SAID RESIN BINDER.
Claim 2
Dependent Claim
154 words
A PROCESS COMPRISING THE STEPS OF: (A) FORMING A NON-WOVEN WEB THE FIBER CONTENT OF WHICH CONSISTS OF AT LEAST 25 WEIGHT PERCENT OF A THERMOPLASTIC POLYMER FIBER UNIFORMLY DISTRIBUTED THERETHROUGH; (B) HEATING ONE SURFACE OF SAID WEB, SMOOTHING, COMPACTING AND DENSIFYING THE FIBER CONTENT THEREOF AND FUSING THE THERMOPLASTIC FIBERS, AT SAID SURFACE INTO A LOOSE POROUS FIBER MATRIX, WHILE LEAVING THE BALANCE OF THE FIBERS IN THE WEB IN A RELATIVELY EXPANDED, INTERLOCKED BUT UNBONDED STATE; (C) DISTRIBUTING A THERMO-RESPONSIVE RESIN BINDER WITHIN THE INTERSTICES OF SAID WEB, SAID RESIN BINDER HAVING A MELTING POINT BELOW THE MELTING POINT OF SAID THERMOPLASTIC POLYMER FIBER; (D) HEATING SAID WEB TO A TEMPERATURE SUFFICIENT TO MELT SAID RESIN BINDER BUT BELOW THAT TEMPERATURE AT WHICH SAID THERMOPLASTIC POLYMER FIBER MELTS; AND (E) COMPACTING SAID WEB TO IMPRESS THE FIBERS THEREOF INTO SAID RESIN BINDER WHILE SIMULTANEOUSLY COOLING SAID WEB TIO SOLIDIFY SAID RESIN BINDER.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |