Patent US3740264A successfully refreshed from Google Patents.
US3740264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproofing cellulose with complexes of heavy metal salts of acid phosphate esters
Assignee: FMC Corp
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Filing: 1971-12-15
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Granted: 1973-06-19
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Expires: 1991-12-15
Abstract
Abstract COMPOSITIONS WHICH ARE WATER-SOLUBLE AMMONIA COMPLEXES OF HEAVY METAL SALTS OF ACID PHOSPHATE ORGANIC ESTERS, THE ORGANIC GROUPS CONTAINING AN AVERAGE OF AT LEAST THREE CARBON ATOMS, ARE USED IN WATER SOLUTIONS TO PRODUCE WEATHER-RESISTANT FLAME-RETARDING TREATMENTS FOR WOOD AND OTHER CELLULOSIC BODIES. THE ORGANIC MOIETIES ARE PREFERABLY CHLORINATED OR BROMINATED TO IMPROVE THEIR FLAME RETRADANCE.
Inventors
- 👤 C Lynch
- 👤 E Orwoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:04
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/52; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; B27K2240/00; B27K2240/30
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |