Patent US3736272A successfully refreshed from Google Patents.
US3736272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-density,freeze-resistant polyurethane foams
Assignee: Bayer Corp
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Filing: 1971-11-01
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Granted: 1973-05-29
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Expires: 1991-11-01
Abstract
Abstract THIS INVENTION RELATES TO LOW DENSITY POLYURETHANE FOAMS WHICH HAVE GOOD FREEZE RESISTANCE WITH GOOD K FACTOR AND K FACTOR STABILITY, EVEN AT A LOW PACKING FACTOR. THESE RESULTS WERE OBTAINED BY ADDING ALUMINUM (HYDROXYSTEARATE) SALTS TO THE POLYURETHANE FOAM FORMULATION. THE INVENTION ALSO RELATES TO STABLE COMPATIBLE PREMIXES OF AMINIC POLYOLS AND THE ALUMINUM (HYDROXYSTEARATE) SALTS WHICH HAVE GOOD AGING CHARACTERISTICS AND CAN BE UTILIZED TO FORM THE POLYURETHANE FOAMS OF THE INVENTION.
Inventors
- 👤 P Mosso
- 👤 N Heights
- 👤 J Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0023; C08K; C08K5/00; C08K5/04; C08K5/09; C08J2375/00; C08J2375/04
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |