US2703316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of high melting lactide
Assignee: EIDP Inc
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Filing: 1951-06-05
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Granted: 1955-03-01
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Expires: 1971-06-05
Abstract
No abstract record available.
Inventors
- 👤 Allan K Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:32
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PRODUCING LACTIDE POLYMERS CAPABLE OF BEING FORMED INTO TOUGH, ORIENTABLE, SELF-SUPPORTING THIN FILMS WHICH COMPRISES HEATING LACTIDE HAVING A MELTING POINT OF MORE THAN 120* C. TO A TEMPERATURE ABOVE THE MELTING POINT AND BELOW 200* C. IN THE PRESENCE OF 0.02% TO 0.1%, BASED ON THE WEIGHT OF MONOMERIC MATERIAL PRESENT, OF A POLYVALENT METAL OXIDE UNTIL A POLYMER HAVING A "TACK" POINT OF 60* TO 130* C. IS FORMED.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PRODUCING LACTIDE POLYMERS CAPABLE OF BEING FORMED INTO TOUGH, ORIENTABLE, SELF-SUPPORTING THIN FILMS WHICH COMPRISES HEATING LACTIDE HAVING A MELTING POINT OF MORE THAN 120* C. TO A TEMPERATURE ABOVE THE MELTING POINT AND BELOW 200* C. IN THE PRESENCE OF 0.02% TO 0.1%, BASED ON THE WEIGHT OF MONOMERIC MATERIAL PRESENT, OF A POLYVALENT METAL OXIDE UNTIL A POLYMER HAVING A "TACK" POINT OF 60* TO 130* C. IS FORMED.
References Cited (Backward Citations)
US1995970A
Cited
US2555385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |