US3060152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyesters from aromatic dicarboxylic acids and polymethylene glycols in the presence of certain tertiary amines
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-10-30
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Granted: 1962-10-23
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Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Ringwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/87; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; C08G63/189; C08G63/20; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR THE PRODUCTION OF SYNTHETIC, HIGHLY POLYMERIC POLYESTERS WHICH COMPRISES THE STEPS OF FORMING A REACTION MIXTURE OF: (1) AT LEAST ONE AROMATIC DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF (1) AN ACID HAVING THE FORMULA
Claim 2
Dependent Claim
39 words
A PROCESS FOR THE PRODUCTION OF SYNTHETIC, HIGHLY POLYMERIC POLYESTERS WHICH COMPRISES THE STEPS OF FORMING A REACTION MIXTURE OF: (1) AT LEAST ONE AROMATIC DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF (1) AN ACID HAVING THE FORMULA
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |