Patent US2617820A successfully refreshed from Google Patents.
US2617820A
Expired / Lapsed
US
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Alkyl benzyl tetrachlorophthalates
Assignee: Monsanto Chemicals Ltd
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Filing: 1950-05-13
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Granted: 1952-11-11
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Expires: 1970-05-13
Abstract
No abstract record available.
Inventors
- 👤 Harry R Gamrath
- 👤 William E Weesner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12; C07; C07C; C07C67/00; C07C67/10; C07C67/11; C07C69/00; C07C69/76
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
AS NEW CHEMICAL COMPOUNDS, THE ALKYL BENZYL TETRACHLOROPHTHALATES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 9 CARBON ATOMS
Claim 2
Dependent Claim
19 words
AS NEW CHEMICAL COMPOUNDS, THE ALKYL BENZYL TETRACHLOROPHTHALATES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 9 CARBON ATOMS
Claim 3
Dependent Claim
73 words
A PROCESS OF PREPARING ALKYL BENZYL TETRACHLOROPHTHALATES, WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 9 CARBON ATOMS, WHICH COMPRISES REACTING AN ALKYL ALCOHOL CONTAINING FROM 1 TO 9 CARBON ATOMS WITH TETRACHLOROPHTHALIC ANHYDRIDE TO FORM THE MONOALKYL ESTER OF TETRACHLOROPHTHALIC ACID, REACTING THE MONOALKYL TETRACHLOROPHTHALATE WITH AN ALKALI METAL CARBONATE TO FORM THE ALKALI METAL SALT OF MONOALKYL TETRACHLOROPHTHALATE, AND REACTING THE ALKALI METAL SALT OF MONOALKYL TETRACHLOROPHTHALATE WITH A BENZYL HALIDE.
Claim 4
Dependent Claim
73 words
A PROCESS OF PREPARING ALKYL BENZYL TETRACHLOROPHTHALATES, WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 9 CARBON ATOMS, WHICH COMPRISES REACTING AN ALKYL ALCOHOL CONTAINING FROM 1 TO 9 CARBON ATOMS WITH TETRACHLOROPHTHALIC ANHYDRIDE TO FORM THE MONOALKYL ESTER OF TETRACHLOROPHTHALIC ACID, REACTING THE MONOALKYL TETRACHLOROPHTHALATE WITH AN ALKALI METAL CARBONATE TO FORM THE ALKALI METAL SALT OF MONOALKYL TETRACHLOROPHTHALATE, AND REACTING THE ALKALI METAL SALT OF MONOALKYL TETRACHLOROPHTHALATE WITH A BENZYL HALIDE.
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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |