US3398019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fireproofing cellulosic material
Assignee: Monsanto Co
•
Filing: 1963-02-21
•
Granted: 1968-08-20
•
Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Robert P Langguth
- 👤 Howard L Vandersall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:05
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; D06M11/07; D06M11/11; D06M11/13; D06M11/51; D06M11/53; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A METHOD FOR PRODUCING WOOD FIBER PRODUCTS WHEREIN SAID PRODUCT IS TREATED WITH AN AQUEOUS SOLUTION OF AN AMMONIUM PHOSPHATE FIRE RETARDANT AND THEREAFTER DRIED, THE IMPROVEMENT COMPRISING TREATING SAID WOOD FIBER PRODUCT, PRIOR TO DRYING, WITH A DECOMPOSITION INHIBITOR OF AN INORGANIC AMMONIUM COMPOUND WHICH RELEASES AMMONIA BELOW THE DECOMPOSITION TEMERATURE OF SAID FIRE RETARDANT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CARBONATES, AMMONIUM CHLORIDE, AMMONIUM FLUORIDE AND AMMONIUM SULFIDE, AND DRYING SAID WOOD FIBER PRODUCT AT TEMPERATURES IN EXCESS OF THE DECOMPOSITION TEMPERATURES OF SAID FIRE RETARDANT, SAID DECOMPOSITION INHIBITOR BEING USED IN AMOUNTS OF RETARDANT TO DECOMPOSITION INHIBITOR ON A WEIGHT RATIO BASIS OF BETWEEN ABOUT 1:1 TO 1:5 IN ORDER TO PREVENT OBJECTIONABLE DISCOLORATIN OF SAID FIBER PRODUCT AS A RESULT OF DECOMPOSITION OF SAID FIRE RETARDANT.
Claim 2
Dependent Claim
132 words
IN A METHOD FOR PRODUCING WOOD FIBER PRODUCTS WHEREIN SAID PRODUCT IS TREATED WITH AN AQUEOUS SOLUTION OF AN AMMONIUM PHOSPHATE FIRE RETARDANT AND THEREAFTER DRIED, THE IMPROVEMENT COMPRISING TREATING SAID WOOD FIBER PRODUCT, PRIOR TO DRYING, WITH A DECOMPOSITION INHIBITOR OF AN INORGANIC AMMONIUM COMPOUND WHICH RELEASES AMMONIA BELOW THE DECOMPOSITION TEMERATURE OF SAID FIRE RETARDANT SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CARBONATES, AMMONIUM CHLORIDE, AMMONIUM FLUORIDE AND AMMONIUM SULFIDE, AND DRYING SAID WOOD FIBER PRODUCT AT TEMPERATURES IN EXCESS OF THE DECOMPOSITION TEMPERATURES OF SAID FIRE RETARDANT, SAID DECOMPOSITION INHIBITOR BEING USED IN AMOUNTS OF RETARDANT TO DECOMPOSITION INHIBITOR ON A WEIGHT RATIO BASIS OF BETWEEN ABOUT 1:1 TO 1:5 IN ORDER TO PREVENT OBJECTIONABLE DISCOLORATIN OF SAID FIBER PRODUCT AS A RESULT OF DECOMPOSITION OF SAID FIRE RETARDANT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |