Patent GB450689A successfully refreshed from Google Patents.
US3165499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film and process for making same
Assignee: EIDP Inc
•
Filing: 1960-10-27
•
Granted: 1965-01-12
•
Expires: 1980-10-27
Abstract
No abstract record available.
Inventors
- 👤 Alles Francis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; B29C71/00; B29K; B29K2067/00; Y; Y10; Y10S; Y10S260/00; Y10S260/23
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
AN ASYMMETRICALLY BIAXIALLY ORIENTED POLYETHYLENE TEREPHTHALATE FILM COMPOSED OF A NETWORK OF CRYSTALLINE AND AMORPHOUS REGIONS HAVING AN APPARENT DENSITY OF 1.37-1.40 GRAMS/CC. AT 25* C., THE AVERAGE CRYSTALLITE LENGTH BEING 50-75 ANGSTROM UNITS, THE AVERAGE AMORPHOUS LENGTH BEING 65-110 ANGSTROM UNITS, THE SUM OF CRYSTALLITE LENGTH AND AMORPHOUS LENGTH BEING 125-160 ANGSTROM UNITS, THE WEIGHTED AVERAGE DISTRIBUTION OF THE LONG AXES OF THE CRYSTALLITES BEING WITHIN AN ANGLE OF 30-45* FROM THE DIRECTION OF GREATER ORIENTATION AND THE THERMAL DIMENSIONAL STABILITY AT 150*C. BEING LESS THAN 15%.
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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |