US2956985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal salts of dithiocarbamic acids as catalysts in the production of polyesters
Assignee: Solutia Inc
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Filing: 1957-11-18
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Granted: 1960-10-18
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Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Jack G Scruggs
- 👤 William A H Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C07; C07C; C07C67/00; C07C67/03; C07C69/00; C07C69/76; C07C69/80; C07C69/82; C07C69/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR PRODUCING POLYMERIC POLYESTERS COMPRISING CONDUCTING A CONDENSATION REACTION OF A GLYCOL CONTAINING 2 TO 10 CARBON ATOMS WITH A DIALKYL ESTER OF AN AROMATIC DICARBOXYLIC ACID WHEREIN THE ALKYL GROUPS CONTAIN 1 TO 5 CARBON ATOMS IN THE PRESENCE OF A CATALYTIC AMOUNT OF COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
51 words
A PROCESS FOR PRODUCING POLYMERIC POLYESTERS COMPRISING CONDUCTING A CONDENSATION REACTION OF A GLYCOL CONTAINING 2 TO 10 CARBON ATOMS WITH A DIALKYL ESTER OF AN AROMATIC DICARBOXYLIC ACID WHEREIN THE ALKYL GROUPS CONTAIN 1 TO 5 CARBON ATOMS IN THE PRESENCE OF A CATALYTIC AMOUNT OF COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
GB753880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |