US3432591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biaxially oriented heat set film of high molecular weight polyethylene terephthalate
Assignee: EIDP Inc
•
Filing: 1966-10-21
•
Granted: 1969-03-11
•
Expires: 1986-10-21
Abstract
No abstract record available.
Inventors
- 👤 Carl John Heffelfinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
C; C08; C08L; C08L67/00; B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B32; B32B; B32B27/00; B32B27/36; G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/739; G11B5/73923; G11B5/73927; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31565; Y10T428/31609; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2534028A
Cited
US3177277A
Cited
US2995779A
Cited
US3165499A
Cited
US3150995A
Cited
US3161710A
Cited
US3216187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |