Patent US3194864A successfully refreshed from Google Patents.
US3194864A
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Method for producing cellular thermoplastic tubing without corrugations
Assignee: OI Glass Inc
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Filing: 1961-12-11
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Granted: 1965-07-13
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Carlton A Richie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29L; B29L2023/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF PRODUCING FLATTENED CELLULAR THERMOPLASTIC MATERIAL COMPRISING THE STEPS OF EXTRUDING HEATED FOAMABLE THERMOPLASTIC MATERIAL THROUGH AN ORIFICE IN THE FORM OF TUBING, EXPANDING SAID TUBING, COOLING SAID EXPANDED TUBING BY PASSING THE SAME THROUGH A CURTAIN OF DIFFUSED GASEOUS MEDIUM LOCATED A DISTANCE FROM THE POINT OF EXTRUSION AT LEAST EQUAL TO THE DIAMETER OF SAID ORIFICE BUT NOT MORE THAN THREE TIMES THE DIAMETER OF SAID ORIFICE, AND COLLAPSING SAID TUBING.
Claim 2
Independent Claim
75 words
THE METHOD OF PRODUCING FLATTENED CELLULAR THERMOPLASTIC MATERIAL COMPRISING THE STEPS OF EXTRUDING HEATED FOAMABLE THERMOPLASTIC MATERIAL THROUGH AN ORIFICE IN THE FORM OF TUBING, EXPANDING SAID TUBING, COOLING SAID EXPANDED TUBING BY PASSING THE SAME THROUGH A CURTAIN OF DIFFUSED GASEOUS MEDIUM LOCATED A DISTANCE FROM THE POINT OF EXTRUSION AT LEAST EQUAL TO THE DIAMETER OF SAID ORIFICE BUT NOT MORE THAN THREE TIMES THE DIAMETER OF SAID ORIFICE, AND COLLAPSING SAID TUBING.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |