Patent US3769232A successfully refreshed from Google Patents.
US3769232A
Expired / Lapsed
US
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Polyurethane foam generating apparatus
Assignee: Olin Corp
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Filing: 1971-04-26
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Granted: 1973-10-30
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Expires: 1991-04-26
Abstract
Abstract AN IMPROVEMENT IS DISCLOSED IN AN APPARATUS FOR THE ONSITE GENERATION OF POLYURETHANE FOAM, WHICH APPARATUS COMPRISES STORAGE TANKS FOR SUPPLYING THE FOAM-FORMING REACTANTS, A STATIC MIXING CHAMBER, AND MEANS FOR CONVEYING THE REACTANTS THROUGH THE MIXING CHAMBER. THE IMPROVEMENTS RESIDES IN PROVIDING MEANS FOR SIMULTANEOUSLY REGULATING THE FLOW OF REACTANTS INTO AND OUT OF THE MIXING CHAMBER.
Inventors
- 👤 T Houldridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7433; B29B7/30; B29B7/32; B29B7/325; B29B7/58; B29B7/72; B29B7/728; B29B7/7409; B29B7/7419; Y; Y10; Y10S; Y10S366/00; Y10S366/604; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |