Patent US2862959A successfully refreshed from Google Patents.
US2862959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixed esters of phthalic acid
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-02-06
•
Granted: 1958-12-02
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Tracy M Patrick
- 👤 Louis O Raether
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:58
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C07; C07C; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
IN A PROCESS FOR THE MANUFACTURE OF A MIXED ESTER OF PHTHALIC ACID OF THE GENERAL FORMULA,
Claim 2
Dependent Claim
17 words
IN A PROCESS FOR THE MANUFACTURE OF A MIXED ESTER OF PHTHALIC ACID OF THE GENERAL FORMULA,
References Cited (Backward Citations)
US1700960A
Cited
US2742494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |