Patent CA547388A successfully refreshed from Google Patents.
Patent US3170827A successfully refreshed from Google Patents.
US3170827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced panel production
Assignee: Union Carbide Corp
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Filing: 1962-02-08
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Granted: 1965-02-23
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Walter D Voelker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:32
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/186; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
THE METHOD OF PREPARING A SANDWICH STRUCTURE COMPRISING UPPER AND LOWER FACING SHEETS WITH A POLYURETHANE FOAM CORE REINFORCED WITH A HONEYCOMB REINFORCEMENT MEMBER DISPOSED THEREBETWEEN WHICH METHOD COMPRISES (1) ADVANCING A LOWER FACING SHEET FROM A FEED POSITION THROUGH A COATING ZONE WHEREN THE SAID SHEET IS COATED WITH A LAYER OF PREDETERMINED THICKNESS OF CHEMICALS ENTIRELY IN LIQUID PHASE WHICH ARE CAPABLE OF INTERACTING TO PRODUCE POLYURTHANE FOAM, (2) ADVANCING THE THUS COATED FACING SHEET THROUGH A REINFORCEMENT PLACEMENT ZONE WHEREIN A HONEYCOMB REINFORCEMENT MEMBER IS PRESSED AGAINST THE SAID COATED SHEET AND INTO BONDING RELATIONSHIP THEREWITH, (3) ADVACING THE SAID COATED SHEET AND CONTIGUOUSLY DISPOSED HONEYCOMB REINFORCEMENT MEMBER THROUGH AN EXPANSION ZONE WHEREIN CHEMICAL REACTION PROCEEDS AND THE SAID COATING GENERATES A POLYURETHANE FOAM WHICH RISES WITHIN THE TUBES OF THE SAID HONEYCOMB REINFORCEMENT MEMBER TO A LEVEL SLIGHTLY ABOVE THE UPPER SURFACE THEREOF, THE AIR IN THE SAID TUBES BEING DISPLACED BY THE RISING FOAM, (4) ADVANCING THE THUS FORMED STRUCTURE COMPRISING THE LOWER
Claim 2
Independent Claim
168 words
THE METHOD OF PREPARING A SANDWICH STRUCTURE COMPRISING UPPER AND LOWER FACING SHEETS WITH A POLYURETHANE FOAM CORE REINFORCED WITH A HONEYCOMB REINFORCEMENT MEMBER DISPOSED THEREBETWEEN WHICH METHOD COMPRISES (1) ADVANCING A LOWER FACING SHEET FROM A FEED POSITION THROUGH A COATING ZONE WHEREN THE SAID SHEET IS COATED WITH A LAYER OF PREDETERMINED THICKNESS OF CHEMICALS ENTIRELY IN LIQUID PHASE WHICH ARE CAPABLE OF INTERACTING TO PRODUCE POLYURTHANE FOAM, (2) ADVANCING THE THUS COATED FACING SHEET THROUGH A REINFORCEMENT PLACEMENT ZONE WHEREIN A HONEYCOMB REINFORCEMENT MEMBER IS PRESSED AGAINST THE SAID COATED SHEET AND INTO BONDING RELATIONSHIP THEREWITH, (3) ADVACING THE SAID COATED SHEET AND CONTIGUOUSLY DISPOSED HONEYCOMB REINFORCEMENT MEMBER THROUGH AN EXPANSION ZONE WHEREIN CHEMICAL REACTION PROCEEDS AND THE SAID COATING GENERATES A POLYURETHANE FOAM WHICH RISES WITHIN THE TUBES OF THE SAID HONEYCOMB REINFORCEMENT MEMBER TO A LEVEL SLIGHTLY ABOVE THE UPPER SURFACE THEREOF, THE AIR IN THE SAID TUBES BEING DISPLACED BY THE RISING FOAM, (4) ADVANCING THE THUS FORMED STRUCTURE COMPRISING THE LOWER
References Cited (Backward Citations)
US2744042A
Cited
US2910396A
Cited
US2816852A
Cited
US2866730A
Cited
US3079289A
Cited
US2983636A
Cited
US3046177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |