Patent US2110854A successfully refreshed from Google Patents.
US3772222A
Expired / Lapsed
US
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Highly resilient flexible polyurethane foams having improved tear strength
Assignee: Dow Chemical Co
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Filing: 1971-11-19
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Granted: 1973-11-13
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Expires: 1991-11-19
Abstract
Abstract FLEXIBLE HIGHLY RESILIENT POLYURETHANE FOAMS HAVING IMPROVED TEAR STRENGTHS ARE PREPARED BY EMPOLYING A SELECTED MODIFIER COMPOUND SUCH AS FOR EXAMPLE TRIS (2,3DIBROMOPROPYL) PHOSPHATE, BIS (1,3-DIBROMO-2-PROPYL) 2,3-DIBROMOPROPYLPHOSPHATE, TRIS (1,3-DIBROMO-2-PROSPHONATE, DIOCTYL PHTHALATE, DIISODECYL PHTHALATE, AND TRISHALOGENATED PROPYL PHOSPHATE.
Inventors
- 👤 C Steward
- 👤 R Pruitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08K; C08K5/00; C08K5/16; C08K5/17; C08L; C08L79/00; C08L79/04; C08L83/00; C08L83/04; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/904; Y10S521/906
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) | 1976-11-12 | 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 |