Patent US3564504A successfully refreshed from Google Patents.
Patent US3137743A successfully refreshed from Google Patents.
US3137743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming foamed structures
Assignee: Tru-Scale Inc
•
Filing: 1960-11-03
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Granted: 1964-06-16
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 Perry H Pelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:09
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3415; B29C44/3426; B29C44/20; B29C44/206; B29C44/30; B29L; B29L2007/00; B29L2009/00; Y; Y10; Y10S; Y10S264/00; Y10S264/10; Y10S264/12; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF MAKING A FOAMED PLASTIC, STRUCTURE OF REDUCED MOISTURE PERMEABILITY FROM SEPARATE, DISCRETE AND AT LEAST PARTIALLY PREEXPANDED PLASTIC BEADS WHICH COMPRISES POSITIONING A QUANTITY OF SAID BEADS IN A CONFINED MOLDING SPACE, HEATING THE CONFINED BEADS AND EFFECTING EXPANSION AND COALESCENCE THEREOF INTO A FOAMED STRUCTURE BY CONDENSING STEAM IN CONTACT THEREWITH, REMOVING CONDENSED MOISTURE FROM SAID STRUCTURE AND THEREBY CAUSING THE OUTER BEADS TO MERGE TOGETHER INTO A HOMOGENEOUS OUTER SURFACE LAYER BY SIMULTANEOUSLY CONTACTING SAID OUTER SURFACE WITH A LAYER OF MOISTUREABSORBENT FABRIC, AND REMOVING THE RESULTING MOISTURELADEN FABRIC FROM CONTACT WITH SAID OUTER SURFACE AND DRYING IT FOR REUSE IN THE PROCESS.
Claim 2
Independent Claim
108 words
A METHOD OF MAKING A FOAMED PLASTIC, STRUCTURE OF REDUCED MOISTURE PERMEABILITY FROM SEPARATE, DISCRETE AND AT LEAST PARTIALLY PREEXPANDED PLASTIC BEADS WHICH COMPRISES POSITIONING A QUANTITY OF SAID BEADS IN A CONFINED MOLDING SPACE, HEATING THE CONFINED BEADS AND EFFECTING EXPANSION AND COALESCENCE THEREOF INTO A FOAMED STRUCTURE BY CONDENSING STEAM IN CONTACT THEREWITH, REMOVING CONDENSED MOISTURE FROM SAID STRUCTURE AND THEREBY CAUSING THE OUTER BEADS TO MERGE TOGETHER INTO A HOMOGENEOUS OUTER SURFACE LAYER BY SIMULTANEOUSLY CONTACTING SAID OUTER SURFACE WITH A LAYER OF MOISTUREABSORBENT FABRIC, AND REMOVING THE RESULTING MOISTURELADEN FABRIC FROM CONTACT WITH SAID OUTER SURFACE AND DRYING IT FOR REUSE IN THE PROCESS.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |