US3268487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization of lactides
Assignee: Shell USA Inc
•
Filing: 1964-08-10
•
Granted: 1966-08-23
•
Expires: 1984-08-10
Abstract
No abstract record available.
Inventors
- 👤 Klootwijk Arie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A PROCESS FOR PREPARING POLYESTERS CONSISTING OF THE REPEATNG UNIT
Claim 2
Dependent Claim
10 words
A PROCESS FOR PREPARING POLYESTERS CONSISTING OF THE REPEATNG UNIT
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |