Patent US2713699A successfully refreshed from Google Patents.
US2713699A
Expired / Lapsed
US
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Method of molding lightweight closed cell material
Assignee: Uniroyal Inc
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Filing: 1952-10-08
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Granted: 1955-07-26
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Expires: 1972-10-08
Abstract
No abstract record available.
Inventors
- 👤 Robert W Pooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/35; B29C44/351; B29C44/58; B29C44/588; B29C33/00; B29C33/0038; B29C33/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD OF MAKING MOLDED LIGHTWEIGHT CLOSED CELL MATERIAL IN A HIGH PRESSURE MOLD HAVING A BOTTOM WALL, SAID WALLS AND A REMOVABLE TOP WALL, AND HAVING A THICK ELASTIC GASKET THEREIN COVERING THE SIDE WALLS AND RESTING ON THE BOTTOM WALL, WHICH COMPRISES PLACING IN THE MOLD SUFFICIENT THERMOPLASTIC STOCK CONTAINING A BLOWING AGENT TO NEARLY FILL THE MOLD, CLOSING THE MOLD UNDER HIGH PRESSURE, SUPPORTING THE TOP WALL OF THE MOLD SPACED SUFFICIENTLY FROM THE GASKET TO PERMIT LEAKAGE BETWEEN THE TOP WALL AND THE GASKET, AND HEATING THE MOLD TO BLOW THE STOCK THEREIN, WHEREBY THE AIR AND GAS IN THE MOLD WILL ESCAPE OVER THE GASKET AND THROUGH THE XXXX SEAMS UNTIL THE GASKET IS EXPANDED VERTICALLY BY THE LATERAL PRESSURE OF THE BLOWING STOCK THEREAGAINST AND SEALS THE MOLD TO BUILD UP HIGH PRESSURE THEREIN AS THE BLOWING AGENT PRODUCES MORE GAS.
Claim 2
Independent Claim
147 words
THE METHOD OF MAKING MOLDED LIGHTWEIGHT CLOSED CELL MATERIAL IN A HIGH PRESSURE MOLD HAVING A BOTTOM WALL, SAID WALLS AND A REMOVABLE TOP WALL, AND HAVING A THICK ELASTIC GASKET THEREIN COVERING THE SIDE WALLS AND RESTING ON THE BOTTOM WALL, WHICH COMPRISES PLACING IN THE MOLD SUFFICIENT THERMOPLASTIC STOCK CONTAINING A BLOWING AGENT TO NEARLY FILL THE MOLD, CLOSING THE MOLD UNDER HIGH PRESSURE, SUPPORTING THE TOP WALL OF THE MOLD SPACED SUFFICIENTLY FROM THE GASKET TO PERMIT LEAKAGE BETWEEN THE TOP WALL AND THE GASKET, AND HEATING THE MOLD TO BLOW THE STOCK THEREIN, WHEREBY THE AIR AND GAS IN THE MOLD WILL ESCAPE OVER THE GASKET AND THROUGH THE XXXX SEAMS UNTIL THE GASKET IS EXPANDED VERTICALLY BY THE LATERAL PRESSURE OF THE BLOWING STOCK THEREAGAINST AND SEALS THE MOLD TO BUILD UP HIGH PRESSURE THEREIN AS THE BLOWING AGENT PRODUCES MORE GAS.
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) | 1958-07-25 | 1959-01-24 | 1959-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-25 | 1963-01-24 | 1963-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-25 | 1967-01-24 | 1967-07-26 | $7700.00 | Window Closed / Lapsed |