US3081293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of lignin and product
Assignee: West Virginia Pulp and Paper Co
•
Filing: 1960-03-11
•
Granted: 1963-03-12
•
Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Doughty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:27
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M11/00; D06M11/68; D06M11/69; D06M11/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
3 words
LIGNIN PHOSPHORUS ESTERS.
Claim 2
Dependent Claim
3 words
LIGNIN PHOSPHORUS ESTERS.
Claim 3
Independent Claim
51 words
THE METHOD OF PREPARING LIGNIN PHOSPHORUS COMPOUNDS WHICH COMPRISES REACTING LIGNIN WITH A PHOSPHORUS COMPOUND SELECTED FROM THE CLASS CONSISTING OF PHOSPHORUS TRIHALIDES, PHOSPHORUS OXYHALIDES, PHOSPHORUS THIOHALIDES, PHOSPHORUS OXIDES, PHOSPHORUS SULFIDES AND ORGANIC DERIVATIVES THEREOF AT A TEMPERATURE BETWEEN AMBIENT TEMPERATURE AND APPROXIMATELY 200* C. FOR 10 MIN. TO 72 HOURS.
Claim 4
Independent Claim
51 words
THE METHOD OF PREPARING LIGNIN PHOSPHORUS COMPOUNDS WHICH COMPRISES REACTING LIGNIN WITH A PHOSPHORUS COMPOUND SELECTED FROM THE CLASS CONSISTING OF PHOSPHORUS TRIHALIDES, PHOSPHORUS OXYHALIDES, PHOSPHORUS THIOHALIDES, PHOSPHORUS OXIDES, PHOSPHORUS SULFIDES AND ORGANIC DERIVATIVES THEREOF AT A TEMPERATURE BETWEEN AMBIENT TEMPERATURE AND APPROXIMATELY 200* C. FOR 10 MIN. TO 72 HOURS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |