Patent US3247040A successfully refreshed from Google Patents.
US3247040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated paperboard
Assignee: BASF Corp
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Filing: 1961-12-21
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Granted: 1966-04-19
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Fine Jerome
- 👤 Charles A Kumins
- 👤 Vernon L Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:04
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B65D65/40; B65D65/403; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2804; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE PROCESS OF CONTINUOUSLY FORMING CORRUGATED PAPERBOARD COMPOSED OF A CORRUGATED CORE MATERIAL LAMINATED TO AT LEAST ONE PAPER LINER BY MEANS OF AN ADHESIVE, THE IMPROVEMENT WHICH CONSISTS IN APPLYING A FOAMED POLYVINYL ACETATE LATEX ADHESIVE TO ONLY THE FLUTE TIPS OF THE CORRUGATED CORE MATERIAL AND ADHERING THE PAPER LINER TO THE CORRUGATED CORE MATERIAL BY HEATING TO A TEMPERATURE OF 200*F. AS A MAXIMUM.
Claim 2
Dependent Claim
68 words
IN THE PROCESS OF CONTINUOUSLY FORMING CORRUGATED PAPERBOARD COMPOSED OF A CORRUGATED CORE MATERIAL LAMINATED TO AT LEAST ONE PAPER LINER BY MEANS OF AN ADHESIVE, THE IMPROVEMENT WHICH CONSISTS IN APPLYING A FOAMED POLYVINYL ACETATE LATEX ADHESIVE TO ONLY THE FLUTE TIPS OF THE CORRUGATED CORE MATERIAL AND ADHERING THE PAPER LINER TO THE CORRUGATED CORE MATERIAL BY HEATING TO A TEMPERATURE OF 200*F. AS A MAXIMUM.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |