Patent US3741860A successfully refreshed from Google Patents.
US3741860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic paperlike film suitable for writing and printing and its preparation
Assignee: Yupo Corp
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Filing: 1970-11-30
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Granted: 1973-06-26
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Expires: 1990-11-30
Abstract
Abstract A FILM OF A HIGH-IMPACT POLYESTYRENE IN WHICH MINUTE RUBBER PARTICLES ARE DISPERSED IN A POLYSTYRENE RESIN MATRIX IS BIAXIALLY DRAWN WITH A DRAWING FACTOR (PRODUCT OF BIAXIAL ELOGATIONS) GREATER THAN 6 AND THEN TREATED AT A TEMPERATURE ABOUT 30*C. WITH A SOLVENT WHICH EXHIBITS SWELLING-INDICATING ACTION WITH RESPECT TO THE RUBBER PARTICLES, AND THEREAFTER THESE ACTIONS OF THE SOLVENT ARE STOPPED BY COOLING THE FILM TO ATEMPERATURE AT WHICH THE SOLVENT DOES NOT EXHIBIT THESE ACTIONS.
Inventors
- 👤 H Otsubo
- 👤 M Sumiyoshi
- 👤 Y Shin
- 👤 Y Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:08
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; C08J2325/00; C08J2325/02; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S264/62; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/25; Y10T428/254
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |