Patent US6261243B1 successfully refreshed from Google Patents.
US3681273A
Expired / Lapsed
US
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Nonburning,intumescent flexible polyurethane foam
Assignee: Kimberly Clark Tissue Co
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Filing: 1969-10-14
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Granted: 1972-08-01
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Expires: 1989-10-14
Abstract
Abstract A NONBURNING IMPARTING AMOUNT OF A MIXTURE OF (A) A NITROGEN AND PHOSPHOROUS-CONTAINING COMPOUND, AND (B) A NITROGEN-CONTAINING POLYOL IS INCORPORATED IN A FOAMABLE POLYURETHANE-FORMING REACTION MIXTURE TO PRODUCE A FLAME-RETARDANT, INTUMESCENT AND NON-BURNING FLEXIBLE POLYURETHANE FOAM WHICH WOULD OTHERWISE BE CONSUMED BY EXPOSURE TO A FLAME.
Inventors
- 👤 David John Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/603; C08G18/65; C08G18/66; C08G18/6603; C08G18/6614; C08G18/6622; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/49; C08K5/51; C08K5/52; C08L; C08L75/00; C08L75/04; C08L77/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S521/00; 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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |