Patent US3406231A successfully refreshed from Google Patents.
US3406231A
Expired / Lapsed
US
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Method for production of tubular fibrous bodies
Assignee: Owens Corning
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Filing: 1964-01-20
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Granted: 1968-10-15
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 William L Ullman
- 👤 James C Baxter
- 👤 Arthur J Pearson
- 👤 Robert E Davis
- 👤 William B Hullhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:03
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/12; F16L9/127; B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; Y; Y10; Y10S; Y10S273/00; Y10S273/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF PRODUCING A TUBULAR INSULATING BODY OF FIBROUS GLASS WHICH COMPRISES DIRECTING A FLAT BELT HELICALLY AROUND A MANDREL, DIRECTING A GENERALLY PLANAR, COMPRESSIBLE, POROUS PACK OF FIBROUS GLASS IMPREGNATED WITH A HEAT CURABLE BINDER IN A PATH TANGETIAL OF THE MANDREL AND ADJACENT TO THE BELT WHEREBY TTHE PACK IS GRIPPED AND COMPRESSED BETWEEN THE BELT AND THE MANDREL AND IS PULLED BY THE BELT IN A HELICAL PATH AROUNG THE MANDREL, AND THE POROUS TUBULAR BODY FORMED BY THE HELICAL TURNS OF THE PACK IS ADVANCED ALONG THE MANDREL BY THE BELT, AND DIRECTING BINDER CURING HOT AIR UNDER PRESSURE OUTWARDLY FROM LONGITUDINAL SECTION THROUGH THE TUBULAR BODY AND DIRECTING ADDITIONAL BINDER CURING HOT AIR FROM AN EXTERIOR SOURCE INWARDLY INTO THE POROUS TUBULAR BODY SUPPLEMENT THE CURING ACTION OF THE HOT AIR DIRECTED OUTWARDLY FROM THE MANDREL.
Claim 2
Independent Claim
142 words
A METHOD OF PRODUCING A TUBULAR INSULATING BODY OF FIBROUS GLASS WHICH COMPRISES DIRECTING A FLAT BELT HELICALLY AROUND A MANDREL, DIRECTING A GENERALLY PLANAR, COMPRESSIBLE, POROUS PACK OF FIBROUS GLASS IMPREGNATED WITH A HEAT CURABLE BINDER IN A PATH TANGETIAL OF THE MANDREL AND ADJACENT TO THE BELT WHEREBY TTHE PACK IS GRIPPED AND COMPRESSED BETWEEN THE BELT AND THE MANDREL AND IS PULLED BY THE BELT IN A HELICAL PATH AROUNG THE MANDREL, AND THE POROUS TUBULAR BODY FORMED BY THE HELICAL TURNS OF THE PACK IS ADVANCED ALONG THE MANDREL BY THE BELT, AND DIRECTING BINDER CURING HOT AIR UNDER PRESSURE OUTWARDLY FROM LONGITUDINAL SECTION THROUGH THE TUBULAR BODY AND DIRECTING ADDITIONAL BINDER CURING HOT AIR FROM AN EXTERIOR SOURCE INWARDLY INTO THE POROUS TUBULAR BODY SUPPLEMENT THE CURING ACTION OF THE HOT AIR DIRECTED OUTWARDLY FROM THE MANDREL.
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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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |