Patent US3247134A successfully refreshed from Google Patents.
US3247134A
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Fire retardant cellular polyurethane compositions containing an organic phosphate amine salt
Assignee: Owens Corning
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Filing: 1962-07-09
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Granted: 1966-04-19
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Charles C L Hwa
- 👤 Robitschek Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A METHOD FOR PREPARING FIRE RETARDANT CELLUALR STRUCTURES COMPRISING COMBINING AN ORGANIC PHOSPHATE AMINE SALT OF THE FORMULA:
Claim 2
Independent Claim
18 words
A METHOD FOR PREPARING FIRE RETARDANT CELLUALR STRUCTURES COMPRISING COMBINING AN ORGANIC PHOSPHATE AMINE SALT OF THE FORMULA:
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |