US3481764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing coated papers
Assignee: Sumika Polycarbonate Ltd
•
Filing: 1966-04-13
•
Granted: 1969-12-02
•
Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 Kohjiro Matsumoto
- 👤 Hisao Usami
- 👤 Sadao Sekiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/60
Claims Analysis
Total Claims: 0
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US3365408A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |