Patent US3272675A successfully refreshed from Google Patents.
US3272675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant adhesives
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1961-06-23
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Granted: 1966-09-13
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Suzumura Hideo
- 👤 Miyahara Hisao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:17
CPC Classifications
C; C09; C09J; C09J129/00; C09J129/02; C09J129/04; C08; C08L; C08L2666/00; C08L2666/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
IN THE MANUFACTURE OF CORRUGATED CARDBOARD RESISTANT TO EXFOLIATION EVEN DURING PROLONGED IMMERSION, THE IMPROVEMENT WHCICH COMPRISES ADHESIVELY SECURING THE COMPONENTS OF THE CARDBOARD TO EACH OTHER BY MEANS OF A WATER-RESISTANT ADHESIVE COMPRISING AN INTIMATE ADMIXTURE IN WATER OF A THREE COMPONENT SYSTEM CONSISTING ESSENTIALLY OF POLYVINYL ALCOHOL, A HIGHLY SILICEOUS PIGMENT, AND AN ALKALI METAL SILICATE, SAID PIGMENT AND FILLER BEING PRESENT IN AN AMOUNT BY WEIGHT WHICH IS ABOUT TWICE THE AMOUNT BY WEIGHT OF POLYVINYL ALCOHOL, AND SAID SILICATE GEING PESENT IN AN AMOUNT BY WEIGHT WHICH IS ALSO ONEFIFTH THAT OF THE POLYVINYL ALCOHOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |