Patent US3223568A successfully refreshed from Google Patents.
US3223568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of foamed plastic materials
Assignee: Individual
•
Filing: 1961-01-30
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Granted: 1965-12-14
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Sterling W Alderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:37
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; B26D3/008; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1061; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR PRODUCING A LAMINATE OF URETHANE FOAM HAVING A VINYL RESIN FILM BACKING COMPRISING THE STEPS OF, FREELY ROTATABLY MOUNTING A CYLINDER OF URETHANE FOAM, CONTINUOUSLY HEATING ONE SIDE OF A SHEET OF VINYL RESIN FILM, SIMULTANEOUSLY COOLING THE OTHER SIDE OF SAID FILM, CONTINUOUSLY APPLYING THE HEATED SIDE OF SAID FILM TO THE SURFACE OF SAID CYLINDER UNDER PRESSURE WHILE CONTINUING TO COOL THE OTHER SIDE OF SAID FILM, CUTTING INWARDLY OF THE SURFACE OF SAID CYLINDER INEARLY AND TRANSVERSELY THE ENTIRE WIDTH THEREOF TO SEVER A LAMINATE OF SAID FOAM AND SAID FILM, AND POSITIVELY DISPLACING SAID SEVERED LAMINATE TO ROTATE SAID CYLINDER AND PROVIDE A CONSTANT OUTPUT OF THE LAMINATE.
Claim 2
Dependent Claim
115 words
A PROCESS FOR PRODUCING A LAMINATE OF URETHANE FOAM HAVING A VINYL RESIN FILM BACKING COMPRISING THE STEPS OF, FREELY ROTATABLY MOUNTING A CYLINDER OF URETHANE FOAM, CONTINUOUSLY HEATING ONE SIDE OF A SHEET OF VINYL RESIN FILM, SIMULTANEOUSLY COOLING THE OTHER SIDE OF SAID FILM, CONTINUOUSLY APPLYING THE HEATED SIDE OF SAID FILM TO THE SURFACE OF SAID CYLINDER UNDER PRESSURE WHILE CONTINUING TO COOL THE OTHER SIDE OF SAID FILM, CUTTING INWARDLY OF THE SURFACE OF SAID CYLINDER INEARLY AND TRANSVERSELY THE ENTIRE WIDTH THEREOF TO SEVER A LAMINATE OF SAID FOAM AND SAID FILM, AND POSITIVELY DISPLACING SAID SEVERED LAMINATE TO ROTATE SAID CYLINDER AND PROVIDE A CONSTANT OUTPUT OF THE LAMINATE.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |