US3734868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load-bearing flexible polyurethane foams and method of making the same
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1972-01-24
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Granted: 1973-05-22
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Expires: 1992-01-24
Abstract
Abstract THE LOAD CARRYING CAPACITY OF FLEXIBLE POLYURETHANE FOAMS IS IMPROVED BY THE USE OF MINOR AMOUNTS OF CERTAIN PRIMARY ND SECONDARY AMINE COMPOUNDS WHICH ARE INSOLUBLE IN THE POLYOL AT TEMPERATURES UP TO ABOUT 100* F. IN CONJUNCTION WITH CERTAIN TERTIARY AMINW CATALYSTS.
Inventors
- 👤 H Uelzmann
- 👤 E Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3838; C08G18/08; C08G18/16; C08G18/18; C08G18/3823; C08G18/3834; C08G18/3842; C08G18/3851
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |