Patent US3574802A successfully refreshed from Google Patents.
US3574802A
Expired / Lapsed
US
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Process for the production of foamed slabs and laminates while continuously sensing and adjusting the width of the slab
Assignee: Imperial Chemical Industries Ltd
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Filing: 1968-10-21
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Granted: 1971-04-13
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Expires: 1988-10-21
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF FOAM SYNTHETIC PLASTIC MATERIALS OPTIONALLY PROVIDED WITH A FACING SHEET ON ONE OR MORE SURFACES WHICH COMPRISES DEPOSITING A FOAMABLE COMPOSITION ONTO A CARRIER WEB, APPLYING A SECOND WEB ABOVE AND IN CONTACT WITH THE DEPOSITED FOAMABLE COMPOSITION, PASSING THE SANDWICH THUS PRODUCED THROUGH A METERING SLIT WHICH PRODUCES A CONTROLLED DISTANCE BETWEEN THE WEBS, SENSING THE WIDTH OF THE FOAMABLE COMPOSITION SUBSEQUENT TO ITS PASSAGE THROUGH SAID SLIT THEN ADJUSTING THE RATE OF DEPOSITING OF SAID FOAMABLE COMPOSITION IN RESPONSE TO THE SENSED WIDTH AND HEATING TO FOAM AND SET THE DEPOSITED LAYER.
Inventors
- 👤 Lesley Hinds
- 👤 David Robin Lander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:32
CPC Classifications
B; B29; B29C; B29C66/00; B29C44/00; B29C44/34; B29C44/60; B29C65/00; B29C65/02; B29C66/70; B29C66/72; B29C66/727; B32; B32B; B32B5/00; B32B5/18; B32B5/20; B29C66/71; B29C66/73; B29C66/739; B29C66/7392; B29C66/7394
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |