Patent US2542819A successfully refreshed from Google Patents.
US2542819A
Expired / Lapsed
US
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Method of impregnating fibrous sheet materials
Assignee: Wyeth Holdings LLC
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Filing: 1947-01-21
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Granted: 1951-02-20
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Expires: 1967-01-21
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
D; D06; D06M; D06M23/00; D06B; D06B3/00; D06B3/10; D06B3/20; D06B3/205; D06B3/206; D06M15/00; D06M15/19; D06M15/37; D06M15/507; D06M15/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF IMPREGNATING WOVEN SHEET MATERIAL COMPRISED OF TWISTED FIBERS WITH A RESIN WHICH COMPRISES CONTINUOUSLY PASSING SAID SHEET MATERIAL THROUGH A BATH OF SAID RESIN AND AT LEAST PARTIALLY UNTWISTING SAID FIBERS OF SAID MATERIAL BY IMPARTING A SIMULTANEOUS FORWARD AND SIDE UNDULATING MOTION TO SAID MATERIAL WHILE IN CONTACT WITH SAID RESIN WHEREBY GAS ENTRAPPED WITHIN SAID MATERIAL IS RELEASED, SAID FORWARD AND SIDE UNDULATING MOTION BEING IMPARTED TO SAID MATERIAL BY PASSING SAID MATERIAL IN OPERATIVE RELATIONSHIP WITH A ROLL ROTATIN IN A DIRECTION OPPOSITE TO THE DIRECTION IN WHICH SAID SHEET MATERIAL IS PASSING THROUGH SAID BATH AND HAVING DISTRIBUTED ON ITS EXTERIOR SURFACES A PLURALITY OF SMOOTH, CIRCULAR, KNOB-LIKE, SPACED PROJECTIONS.
Claim 2
Independent Claim
117 words
THE METHOD OF IMPREGNATING WOVEN SHEET MATERIAL COMPRISED OF TWISTED FIBERS WITH A RESIN WHICH COMPRISES CONTINUOUSLY PASSING SAID SHEET MATERIAL THROUGH A BATH OF SAID RESIN AND AT LEAST PARTIALLY UNTWISTING SAID FIBERS OF SAID MATERIAL BY IMPARTING A SIMULTANEOUS FORWARD AND SIDE UNDULATING MOTION TO SAID MATERIAL WHILE IN CONTACT WITH SAID RESIN WHEREBY GAS ENTRAPPED WITHIN SAID MATERIAL IS RELEASED, SAID FORWARD AND SIDE UNDULATING MOTION BEING IMPARTED TO SAID MATERIAL BY PASSING SAID MATERIAL IN OPERATIVE RELATIONSHIP WITH A ROLL ROTATIN IN A DIRECTION OPPOSITE TO THE DIRECTION IN WHICH SAID SHEET MATERIAL IS PASSING THROUGH SAID BATH AND HAVING DISTRIBUTED ON ITS EXTERIOR SURFACES A PLURALITY OF SMOOTH, CIRCULAR, KNOB-LIKE, SPACED PROJECTIONS.
References Cited (Backward Citations)
US1268430A
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US1953799A
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US2040105A
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US2176835A
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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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |