Patent US3515567A successfully refreshed from Google Patents.
US3515567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surface treating polymer film to produce paper-like article
Assignee: Individual
•
Filing: 1967-01-20
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Granted: 1970-06-02
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Expires: 1987-01-20
Abstract
No abstract record available.
Inventors
- 👤 Kaneyasu Tani
- 👤 Bunkichi Yamada
- 👤 Shozo Imoto
- 👤 Shiro Kawazoe
- 👤 Wachio Ichihara
- 👤 Tatsuhiko Nagai
- 👤 Hiroaki Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:10
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2209940A
Cited
US2790727A
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US2662033A
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US2848752A
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US3135622A
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US2993805A
Cited
US3078178A
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US3100721A
Cited
US3108872A
Cited
US3208875A
Cited
US3298895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |