US3431081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for metering and mixing polyurethane components
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1963-11-01
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Granted: 1969-03-04
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 Harry Edwards
- 👤 Charles Frederick Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
B; B01; B01J; B01J4/00; B01J4/008; B01J3/00; B01J3/04; B01J3/044; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/60; B29B7/603; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0895; Y; Y10; Y10S; Y10S521/00; Y10S521/917; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2499; Y10T137/2506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |