Patent US3250839A successfully refreshed from Google Patents.
US3250839A
Expired / Lapsed
US
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Process for making fibrous articles
Assignee: Hawley Products Co
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Filing: 1964-06-30
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Granted: 1966-05-10
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Expires: 1984-06-30
Abstract
No abstract record available.
Inventors
- 👤 Luca Peter L De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
B; B27; B27N; B27N5/00; B27N5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PREPARING A FIBROUS ARTICLE CONTAINING PREDETERMINED AREAS OF LOWER FIBER DENSITY THAN OTHER AREAS ADJACENT THERETO WHICH COMPRISES PREPARING A WET FIBROUS PREFORM OF SUBSTANTIALLY UNIFORM FIBER DENSITY AND SUBJECTING SAID WET PREFORM TO DRYING BETWEEEN HEATED, OPPOSING DIES, AT LEAST ONE OF SAID DIES HAING AT LEAST ONE CAVITY IN THE SURFACE THEREOF WHICH IS BROUGHT IN CONTACT WITH A SURFACE OF SAID PREFORM, SAID CAVITY BEING SUFFICIENTLY LARGE TO ALLOW THE FIBERS OF SAID PREFORM TO BE DISTRIBUTED THEREIN AND CAUSE THE FIBER DENSITY OF SAID PREFORM OPPOSITE SAID CAVITY TO BECOME MEASURABLY LESS THAN THE FIBER DENSITY IN ADJACENT AREAS OF SAID PREFORM.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PREPARING A FIBROUS ARTICLE CONTAINING PREDETERMINED AREAS OF LOWER FIBER DENSITY THAN OTHER AREAS ADJACENT THERETO WHICH COMPRISES PREPARING A WET FIBROUS PREFORM OF SUBSTANTIALLY UNIFORM FIBER DENSITY AND SUBJECTING SAID WET PREFORM TO DRYING BETWEEEN HEATED, OPPOSING DIES, AT LEAST ONE OF SAID DIES HAING AT LEAST ONE CAVITY IN THE SURFACE THEREOF WHICH IS BROUGHT IN CONTACT WITH A SURFACE OF SAID PREFORM, SAID CAVITY BEING SUFFICIENTLY LARGE TO ALLOW THE FIBERS OF SAID PREFORM TO BE DISTRIBUTED THEREIN AND CAUSE THE FIBER DENSITY OF SAID PREFORM OPPOSITE SAID CAVITY TO BECOME MEASURABLY LESS THAN THE FIBER DENSITY IN ADJACENT AREAS OF SAID PREFORM.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |