US3174887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a sandwich structure from a pair of foam coated sheets
Assignee: Union Carbide Corp
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Filing: 1959-10-12
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Granted: 1965-03-23
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Expires: 1979-10-12
Abstract
No abstract record available.
Inventors
- 👤 Walter D Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:37
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/52; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1034; Y10T156/1052; Y10T156/1059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE METHOD OF PRODUCING A SANDWICH STRUCTURE COMPRISING A PAIR OF FACING SHEETS AND INTERMEDIATE CORE OF PLASTIC FOAM DERIVED FROM A MIXTURE OF SYNTHETIC RESIN FOAM-FORMING CHEMICALS INTERACTING TO PRODUCE A GAS WHICH CAUSES THE MIXTURE TO EXPAND TO FORM A PLASTIC FOAM, THE IMPROVEMENT WHICH COMPRISES: APPLYING TO OPPOSITELY DISPOSED REGIONS ON OPPOSING SURFACES OF EACH OF TWO ADVANCING FACING SHEETS A PREDETERMINED QUANTITY OF A MIXTURE OF SYNTHETIC RESIN FOAM-FORMING CHEMICALS TO COAT AT LEAST A MAJOR PORTION OF EACH OF SAID SURFACES THEREWITH; ADVANCING SAID FACING SHEETS WITH THE COATED SURFACES SPACED FROM AND FACING EACH OTHER AT A PRESELECTED DISTANCE THROUGH A HEATED REACTION ZONE TO EFFECT CHEMICAL REACTION OF THE SYMTHETIC RESIN FOAM-FORM-
Claim 2
Dependent Claim
120 words
IN THE METHOD OF PRODUCING A SANDWICH STRUCTURE COMPRISING A PAIR OF FACING SHEETS AND INTERMEDIATE CORE OF PLASTIC FOAM DERIVED FROM A MIXTURE OF SYNTHETIC RESIN FOAM-FORMING CHEMICALS INTERACTING TO PRODUCE A GAS WHICH CAUSES THE MIXTURE TO EXPAND TO FORM A PLASTIC FOAM, THE IMPROVEMENT WHICH COMPRISES: APPLYING TO OPPOSITELY DISPOSED REGIONS ON OPPOSING SURFACES OF EACH OF TWO ADVANCING FACING SHEETS A PREDETERMINED QUANTITY OF A MIXTURE OF SYNTHETIC RESIN FOAM-FORMING CHEMICALS TO COAT AT LEAST A MAJOR PORTION OF EACH OF SAID SURFACES THEREWITH; ADVANCING SAID FACING SHEETS WITH THE COATED SURFACES SPACED FROM AND FACING EACH OTHER AT A PRESELECTED DISTANCE THROUGH A HEATED REACTION ZONE TO EFFECT CHEMICAL REACTION OF THE SYMTHETIC RESIN FOAM-FORM-
References Cited (Backward Citations)
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US2762738A
Cited
US2866730A
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US2841205A
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US3061475A
Cited
US2985219A
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |