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US3825520A
Expired / Lapsed
US
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Smoke-retardant styrene polymer compositions containing a metal phthalocyanine
Assignee: Monsanto Research Corp
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Filing: 1972-12-29
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Granted: 1974-07-23
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Expires: 1992-12-29
Abstract
Abstract SMOKE-RETARDANT POLYMER COMPOSITIONS COMPRISING A STYRENE POLYMER AND AT LAST A SUFFICIENT AMOUNT OF AN IRON, COPPER, MANGANESE, VANADYL OR COBALY PHTHALOCYANINE TO REDUCE SMOKING.
Inventors
- 👤 L Parts
- 👤 J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:46
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |