US2889356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conjugated diacetylenic glycol esters
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-11-29
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Granted: 1959-06-02
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Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 George E Bennett
- 👤 Margaret D Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:44
CPC Classifications
C; C07; C07C; C07C69/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
THE PROCESS WHICH COMPRISES CONTACING IN A POLAR MEDIUM A PHTHALIC ACID HALF-ESTER OF A LOWER ACETYLENIC PRIMARY ALCOHOL CONTAINING A FREE ACETYLENIC HYDROGEN ATOM WITH A CUPROUS HALIDE, AN AMMONIUM BALIDE, AND AN OXIDIZING AGENT, AND ISOLATING FROM THE RESULTING REACTION PRODUCT A DI(HYDROGEN PHTHALATE) ESTER OF A CONJUGATED DIACETYLENIC GLYCOL.
Claim 2
Dependent Claim
52 words
THE PROCESS WHICH COMPRISES CONTACING IN A POLAR MEDIUM A PHTHALIC ACID HALF-ESTER OF A LOWER ACETYLENIC PRIMARY ALCOHOL CONTAINING A FREE ACETYLENIC HYDROGEN ATOM WITH A CUPROUS HALIDE, AN AMMONIUM BALIDE, AND AN OXIDIZING AGENT, AND ISOLATING FROM THE RESULTING REACTION PRODUCT A DI(HYDROGEN PHTHALATE) ESTER OF A CONJUGATED DIACETYLENIC GLYCOL.
Claim 3
Dependent Claim
16 words
A DIIHYDROGEN PHTHALATE) ESTER OF A CONJUGATED DIACETYLENIC GLYCOL HAVING NOT MORE THAN 12 CARBON ATOMS.
Claim 4
Dependent Claim
16 words
A DIIHYDROGEN PHTHALATE) ESTER OF A CONJUGATED DIACETYLENIC GLYCOL HAVING NOT MORE THAN 12 CARBON ATOMS.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |