US3700540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biaxially oriented polyethylene-1:2-diphenoxyethane-4:4'-dicarboxylate sheets
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-03-24
•
Granted: 1972-10-24
•
Expires: 1990-03-24
Abstract
Abstract BALANCED BIAXIALLY ORIENTED SHEET OF POLYETHYLENE-1:2DIPHENOXYETHANE-4:4''-DICARBOXYLATE OF THICKNESS AT LEAST 750 GAUGE WHICH HAS BEEN HEAT SET BEFORE ORIENTATION.
Inventors
- 👤 Richard Harold Barclay Buteux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |