US2995779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment for polymeric film to restrain gauge variation
Assignee: EIDP Inc
•
Filing: 1959-03-12
•
Granted: 1961-08-15
•
Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Winter Frederick Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:41
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/14; B29C55/146; B29C71/00; B29K; B29K2067/00; Y; Y10; Y10S; Y10S264/00; Y10S264/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR TREATING A SUBSTANTIALLY AMORPHOUS POLYETHYLENE TEREPHTHALATE FILM WHICH COMPRISES THE STEPS, IN SEQUENCE, OF HEATING SAID FILM TO A TEMPERATURE OF 80*-90*C., STRETCHING SAID FILM AT THE TEMPERATURE OF 80*-90*C. AT LEAST 3.3 TIMES ITS INITIAL WIDTH, THEREAFTER,
Claim 2
Dependent Claim
41 words
A PROCESS FOR TREATING A SUBSTANTIALLY AMORPHOUS POLYETHYLENE TEREPHTHALATE FILM WHICH COMPRISES THE STEPS, IN SEQUENCE, OF HEATING SAID FILM TO A TEMPERATURE OF 80*-90*C., STRETCHING SAID FILM AT THE TEMPERATURE OF 80*-90*C. AT LEAST 3.3 TIMES ITS INITIAL WIDTH, THEREAFTER,
References Cited (Backward Citations)
US2578899A
Cited
US2627088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |