US3476582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the water resistance of paper
Assignee: Kuraray Co Ltd
•
Filing: 1966-03-31
•
Granted: 1969-11-04
•
Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 Saburo Imoto
- 👤 Kyoichiro Ikari
- 👤 Tatsuaki Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:19
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1625672A
Cited
US2043324A
Cited
US2474292A
Cited
US2487448A
Cited
US2919205A
Cited
US3035966A
Cited
US3223579A
Cited
US3218183A
Cited
US3218191A
Cited
US3303155A
Cited
US3365408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |