Patent US3771963A successfully refreshed from Google Patents.
US3771963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of foams and homogeneous materials and apparatus therefor
Assignee: Bayer AG
•
Filing: 1971-06-21
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Granted: 1973-11-13
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Expires: 1991-06-21
Abstract
Abstract In the production of moulded articles from at least two components wherein the components at elevated pressure are released into a mixing chamber at a lower pressure and the release of pressure is utilized in the mixing of the components, and the mixed components are discharged from the mixing chamber into a mould, the two components are combined at elevated pressure and are then immediately introduced into the mixing chamber.
Inventors
- 👤 K Breer
- 👤 K Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:12
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7457; Y; Y10; Y10S; Y10S366/00; Y10S366/604; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
Apparatus according to claim 1, and a mixing chamber for receiving the reactants issuing from the discharge opening and thoroughly mixing them together.
Claim 2
Dependent Claim
26 words
Apparatus according to claim 1, said stem when the end tip thereof is received in said discharge opening, sealing the discharge opening from the second duct.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1, said chamber forming an annulus about said stem with the stem received in the discharge opening.
Claim 4
Dependent Claim
14 words
Apparatus according to claim 2, wherein the mixing chamber is mounted on the housing.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2, and a mould for receiving the reactants, the mixing chamber being mounted on the mould.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 2, the mixing chamber having a baffle surface opposite the discharge opening for improved mixing of the reactants.
References Cited (Backward Citations)
US3169833A
Cited
US3068075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |