Patent US3574044A successfully refreshed from Google Patents.
US3574044A
Expired / Lapsed
US
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Printed film of polybutene-1
Assignee: Princeton Chemical Research Inc
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Filing: 1965-02-11
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Granted: 1971-04-06
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Expires: 1985-02-11
Abstract
Abstract METHOD OF MAKING PRINTED POLYBUTENE-1 BY FORMING A FILM OF SUCH POLYMER; STRETCHING THE FILM AN AMOUNT SUFFICIENT TO CAUSE THE FILM TO BECOME OPAQUE; AND TREATING SELECTED PORTIONS OF THUS STRETCHED FILM WITH HEAT AND/OR PRESSURE UNDER CONDITIONS SUFFICIENT TO RENDER SUCH PORTIONS SUBSTANTIALLY TRANSPARENT.
Inventors
- 👤 Thomas Hugh Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:02
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B27; B27B; B27B27/00; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/918; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 0
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |