US3776702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mineral-filled foam production
Assignee: Shell USA Inc
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Filing: 1971-09-07
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Granted: 1973-12-04
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Expires: 1991-09-07
Abstract
Abstract Apparatus for preparing a polyurethane foam containing granular filler which comprises: a normally vertically dispersed tubular body, a reservoir for granular filler mounted thereon, having an outlet disposed to supply granular material through the tubular body; a liquid supply conduit coupled to a source of liquid to supply liquid to a gas supply conduit coupled to a source of compressed gas and having an outlet within the tubular body at a point below the outlet of said reservoir.
Inventors
- 👤 P Chant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:14
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/20; B01F25/23; B01F25/70; B01F25/72; B01F25/721; Y; Y10; Y10S; Y10S261/00; Y10S261/26; Y10S366/00; Y10S366/604
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
Apparatus as in claim 1 having a plurality of gas supply conduits arranged in a regular pattern around the tubular body.
Claim 2
Dependent Claim
133 words
Apparatus for preparing a polyurethane foam containing granular filler which comprises: a normally vertically disposed tubular body; a reservoir mounted above said tubular body and having an annular outlet communicating with the interior of said tubular body and disposed to supply granular material to said tubular body, said outlet comprising a diffusor and an element mounted below and centrally to the diffusor; a gas supply conduit, said gas supply conduit being coupled to a source of compressed gas and having an outlet communicating with the interior of said tubular body at a point below the outlet of said reservoir; and a liquid supply conduit, said liquid supply conduit beiNg coupled to a source of liquid and communicating with the gas supply conduit and disposed to supply liquid to said gas supply conduit outlet.
Claim 3
Dependent Claim
20 words
Apparatus as in claim 1 wherein the liquid supply conduit issues at a right angle into the gas supply conduit.
References Cited (Backward Citations)
US3147955A
Cited
US3129064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |