Patent US3365766A successfully refreshed from Google Patents.
US3365766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed wool-synthetic fiber papermakers' felt
Assignee: Appleton Mills
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Filing: 1965-04-01
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Granted: 1968-01-30
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Charles G Tewksbury
- 👤 Louis R Mizell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:35
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF MAKING A PRE-BROKEN-IN PAPERMAKERS'' FELT COMPRISING FORMING A FABRIC FROM FIBERS CONSISTING OF AT LEAST ABOUT 15% TO ABOUT 50% SYNTHETIC THERMOPLASTIC FIBERS AND AT LEAST ABOUT 50% WOOL FIBERS BASED ON THE TOTAL WEIGHT OF THE FABRIC, FULLING THE COMPOSITE FABRIC TO DISTRIBUTE THE WOOL FIBERS THROUGHOUT THE FABRIC, COMPRESSING THE THICKNESS OF THE FABRIC BY SUBJECTING THE FABRIC TO HEAT TO ESTABLISH IN THE FABRIC A TEMPERATURE OF AT LEAST ABOUT 150*F. BUT BELOW THAT AT WHICH THE SYNTHETIC FIBERS BECOME TACKY AND SIMULTANEOUSLY TO PRESSURE OF FROM ABOUT 50 TO ABOUT 400 P.S.I. TO PERMANENTLY SET THE THERMOPLASTIC FIBERS IN THE COMPRESSED CONFIGURATION WHICH, IN TURN, MECHANICALLY HOLD THE WOOL PORTION OF THE FIBERS OF THE FABRIC IN THE COMPRESSED CONFIGURATION.
Claim 2
Independent Claim
127 words
A METHOD OF MAKING A PRE-BROKEN-IN PAPERMAKERS'' FELT COMPRISING FORMING A FABRIC FROM FIBERS CONSISTING OF AT LEAST ABOUT 15% TO ABOUT 50% SYNTHETIC THERMOPLASTIC FIBERS AND AT LEAST ABOUT 50% WOOL FIBERS BASED ON THE TOTAL WEIGHT OF THE FABRIC, FULLING THE COMPOSITE FABRIC TO DISTRIBUTE THE WOOL FIBERS THROUGHOUT THE FABRIC, COMPRESSING THE THICKNESS OF THE FABRIC BY SUBJECTING THE FABRIC TO HEAT TO ESTABLISH IN THE FABRIC A TEMPERATURE OF AT LEAST ABOUT 150*F. BUT BELOW THAT AT WHICH THE SYNTHETIC FIBERS BECOME TACKY AND SIMULTANEOUSLY TO PRESSURE OF FROM ABOUT 50 TO ABOUT 400 P.S.I. TO PERMANENTLY SET THE THERMOPLASTIC FIBERS IN THE COMPRESSED CONFIGURATION WHICH, IN TURN, MECHANICALLY HOLD THE WOOL PORTION OF THE FIBERS OF THE FABRIC IN THE COMPRESSED CONFIGURATION.
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) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |