Patent US2746895A successfully refreshed from Google Patents.
US2746895A
Expired / Lapsed
US
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Manufacture of fibrer felts
Assignee: Wood Conversion Co
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Filing: 1951-06-19
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Granted: 1956-05-22
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Expires: 1971-06-19
Abstract
No abstract record available.
Inventors
- 👤 Thure C Duvall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/26; D21H5/2607; D21H5/2628; D21H5/2642; D21H11/00; D21H11/02; D21H11/06; D21H17/00; D21H17/60; D21H25/00; Y; Y10; Y10T; Y10T442/00; Y10T442/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE METHOD OF MAKING A FIBER FELT COMPRISING DEPOSITING FIBERS AND BONDING AGENT FROM AIR SUSPENSION IN THE FORM OF A LOW-DENSITY OPEN AND POROUS UNBOUNDED MAT SUBJECT TO SUBSEQUENT DENSIFICATION BY COMPRESSION, APPLYING AN ADDITIVE IN FINELY DIVIDED FORM TO THE TOPMOST FIBERS ON AT LEAST A PORTION OF THE EXPOSED TOP OF SAID MAT WHEREBY TO CHANGE THE SURFACE CHARACTERISTICS OF SAID FIBERS ON AT LEAST A PORTION OF THE EXPOSED TOP OF SAID FIBERS, DEPOSITING ADDITIONAL SUBSTANTIALLY INDIVIDUALIZED FIBERS AND BONDING AGENT TO FORM A MAT ON TOP OF SAID FIRST DEPOSITED LOW DENSITY MAT WHEREBY THE ADDITIONAL DEPOSITED FIBERS MESH INTO THE SAID OPENINGS OF SAID FIRST DEPOSITED MAT FOR INTEGRALLY FELTING THE TWO MATS TOGETHER, DENSIFYING THE INTERFELTED UNBONDED MATS TO A HIGHER DEGREE OF FELTING, AND SETTING THE BONDING AGENT TO MAINTAIN THE FELTING.
Claim 2
Independent Claim
140 words
THE METHOD OF MAKING A FIBER FELT COMPRISING DEPOSITING FIBERS AND BONDING AGENT FROM AIR SUSPENSION IN THE FORM OF A LOW-DENSITY OPEN AND POROUS UNBOUNDED MAT SUBJECT TO SUBSEQUENT DENSIFICATION BY COMPRESSION, APPLYING AN ADDITIVE IN FINELY DIVIDED FORM TO THE TOPMOST FIBERS ON AT LEAST A PORTION OF THE EXPOSED TOP OF SAID MAT WHEREBY TO CHANGE THE SURFACE CHARACTERISTICS OF SAID FIBERS ON AT LEAST A PORTION OF THE EXPOSED TOP OF SAID FIBERS, DEPOSITING ADDITIONAL SUBSTANTIALLY INDIVIDUALIZED FIBERS AND BONDING AGENT TO FORM A MAT ON TOP OF SAID FIRST DEPOSITED LOW DENSITY MAT WHEREBY THE ADDITIONAL DEPOSITED FIBERS MESH INTO THE SAID OPENINGS OF SAID FIRST DEPOSITED MAT FOR INTEGRALLY FELTING THE TWO MATS TOGETHER, DENSIFYING THE INTERFELTED UNBONDED MATS TO A HIGHER DEGREE OF FELTING, AND SETTING THE BONDING AGENT TO MAINTAIN THE FELTING.
References Cited (Backward Citations)
US1645858A
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US2086757A
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US2155875A
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US2164499A
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US2188373A
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US2341130A
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US2288095A
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US2382290A
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US2483404A
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US2543101A
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US2581069A
Cited
US2569765A
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US2577205A
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US2698271A
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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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |