US3166454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing corrugated polyurethane foam panels
Assignee: Union Carbide Corp
•
Filing: 1962-01-15
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Granted: 1965-01-19
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Walter D Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C44/306; B29C65/00; B29C65/48; B29C65/4805; B29C65/483; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7894; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/133; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C66/70; B29C66/71; B29C66/72; B29C66/727; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/24521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A METHOD FOR CONTINUOUS PRODUCTION OF A CORRUGATED PANEL COMPRISING A PAIR OF FACING SHEETS AND INTERPOSED POLYURETHANE FOAM LAYER, WHICH COMPRISES THE STEPS OF: ADVANCING A PAIR OF FACING SHEETS FROM A FEED POSITION INTO A COATING ZONE; PREPARING A FROTH OF A LIQUID PHASE FOAM-FORMING COMPOSITION COMPRISING A POLYOL AND AN ORGANIC POLYISOCYANATE BY DISSOLVING A COMPRESSED GAS IN SAID LIQUID PHASE COMPOSITION AND SUBSEQUENTLY PERMITTING SAID GAS TO EXPAND; APPLYING A LAYER OF SAID FROTH OF PREDETERMINED THICKNESS BETWEEN SAID ADVANCING FACING SHEETS IN SAID COATING ZONE TO FORM A SANDWICH STRUCTURE; PARTIALLY CURING SAID SANDWICH STRUCTURE TO DEVELOP APPRECIABLE TENSILE STRENGTH THROUGH PARTIAL REACTION OF THE COMPONENTS THEREOF; PASSING SAID SANDWICH STRUCTURE CONTINUOUSLY THROUGH SHAPING DIES TO FORM A CONTINUOUSLY LONGITUDINALLY CORRUGATED STRUCTURE, SAID CORRUGATED STRUCTURE SUBSEQUENTLY RETAINING THE CORRUGATED CONFIGURATION AS A RESULT OF THE TENSILE STRENGHT DEVELOPED BY SAID PARTIAL CURING; FULLY CURING SAID CORRUGATED STRUCTURE TO COMPLETE REACTION BETWEEN THE COMPONENTS THEREOF SO AS TO FORM A CORRUGATED PANEL COMPRISING A PAIR OF FACING SHEETS AND INTERPOSED LAYER OF CURED POLYURETHANE FOAM; AND REMOVING THE ADVANCING CORRUGATED PANEL IN A PRODUCT REMOVAL ZONE.
Claim 2
Independent Claim
190 words
A METHOD FOR CONTINUOUS PRODUCTION OF A CORRUGATED PANEL COMPRISING A PAIR OF FACING SHEETS AND INTERPOSED POLYURETHANE FOAM LAYER, WHICH COMPRISES THE STEPS OF: ADVANCING A PAIR OF FACING SHEETS FROM A FEED POSITION INTO A COATING ZONE; PREPARING A FROTH OF A LIQUID PHASE FOAM-FORMING COMPOSITION COMPRISING A POLYOL AND AN ORGANIC POLYISOCYANATE BY DISSOLVING A COMPRESSED GAS IN SAID LIQUID PHASE COMPOSITION AND SUBSEQUENTLY PERMITTING SAID GAS TO EXPAND; APPLYING A LAYER OF SAID FROTH OF PREDETERMINED THICKNESS BETWEEN SAID ADVANCING FACING SHEETS IN SAID COATING ZONE TO FORM A SANDWICH STRUCTURE; PARTIALLY CURING SAID SANDWICH STRUCTURE TO DEVELOP APPRECIABLE TENSILE STRENGTH THROUGH PARTIAL REACTION OF THE COMPONENTS THEREOF; PASSING SAID SANDWICH STRUCTURE CONTINUOUSLY THROUGH SHAPING DIES TO FORM A CONTINUOUSLY LONGITUDINALLY CORRUGATED STRUCTURE, SAID CORRUGATED STRUCTURE SUBSEQUENTLY RETAINING THE CORRUGATED CONFIGURATION AS A RESULT OF THE TENSILE STRENGHT DEVELOPED BY SAID PARTIAL CURING; FULLY CURING SAID CORRUGATED STRUCTURE TO COMPLETE REACTION BETWEEN THE COMPONENTS THEREOF SO AS TO FORM A CORRUGATED PANEL COMPRISING A PAIR OF FACING SHEETS AND INTERPOSED LAYER OF CURED POLYURETHANE FOAM; AND REMOVING THE ADVANCING CORRUGATED PANEL IN A PRODUCT REMOVAL ZONE.
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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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |