Patent US2680077A successfully refreshed from Google Patents.
US2680077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameproofing composition of nitrogen-phosphorus compound in combination with organic compound having free hydroxy radicals
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-12-30
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Granted: 1954-06-01
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Morris L Nielsen
- 👤 Russell W Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:27
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
AN INTUMESCING FIRE-RETARDING COMPOSITION COMPOSED OF THE WATER-INSOLUBLE REACTION PRODUCT OF PHOSPHORYL CHLORIDE AND ANHYDROUS AMMONIA, SAID WATER-INSOLUBLE PRODUCT HAVING A NITROGEN/PHOSPHORUS RATIO BETWEEN 1.72:1 AND 1.80:1, IN COMBUSTION WITH AN ALKYD RESIN HAVING FREE HYDROXY RADICALS.
Claim 2
Dependent Claim
37 words
AN INTUMESCING FIRE-RETARDING COMPOSITION COMPOSED OF THE WATER-INSOLUBLE REACTION PRODUCT OF PHOSPHORYL CHLORIDE AND ANHYDROUS AMMONIA, SAID WATER-INSOLUBLE PRODUCT HAVING A NITROGEN/PHOSPHORUS RATIO BETWEEN 1.72:1 AND 1.80:1, IN COMBUSTION WITH AN ALKYD RESIN HAVING FREE HYDROXY RADICALS.
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) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |