US3300447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing the acid number of polyesters
Assignee: Bayer AG
•
Filing: 1962-04-17
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Granted: 1967-01-24
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Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Thoma Wilhelm
- 👤 Rinke Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:59
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF REDUCING THE ACIDITY OF POLYESTERS HAVING AN ACID NUMBER GREATER THAN ABOUT 1 AND LESS THAN ABOUT 5 TO AN ACID NUMBER BELOW ABOUT 1 WHICH COMPRISES HEATING SAID POLYESTER TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 20*C. TO ABOUT 150*C. WITH SUFFICIENT OF A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
54 words
THE METHOD OF REDUCING THE ACIDITY OF POLYESTERS HAVING AN ACID NUMBER GREATER THAN ABOUT 1 AND LESS THAN ABOUT 5 TO AN ACID NUMBER BELOW ABOUT 1 WHICH COMPRISES HEATING SAID POLYESTER TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 20*C. TO ABOUT 150*C. WITH SUFFICIENT OF A COMPOUND 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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |