US3617427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated fiberboard
Assignee: Alton Box Board Co
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Filing: 1969-08-22
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Granted: 1971-11-02
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Expires: 1989-08-22
Abstract
Abstract Corrugated fiberboard which resists deterioration in strength when in the presence of moisture or water, and intermediate resin treated medium and liner sheet members useful in the manufacture thereof. Such board is made by treating medium and, optionally, liner members with an aminoplast modified phenol aldehyde resole resin composition and thereafter bonding corrugated medium to liner members with a thermosetting waterproof adhesive system.
Inventors
- 👤 John R Le Blanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
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; B31F1/2809; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
184 words
A corrugated fiberboard construction adapted to be rigid when wet comprising: A. as a medium, a corrugated sheet member of claim 1 having a thickness of from about 7 to 15 thousandths of an inch and a grade weight of from about 25 to 36 pounds per 1,000 sq. ft., B. as a liner, a sheet member having a thickness of from about 5 to 20 thousandths of an inch and having a grade weight of from about 33 to 120 pounds per 1,000 sq. ft., C. as an adhesive, a bonding composition selected from the group consisting of phenol-starch-formaldehyde adhesives, resorcinol-starch-formaldehyde adhesives, urea-starch-formaldehyde adhesives, and aminoplast modified phenol-formaldehyde starch adhesives and having a cure time which is not less than about 15 seconds at 170* C., E. said corrugated medium sheet member being positioned adjacent said liner sheet member and being bonded thereto at positions of mutual contact therebetween by said adhesive, and F. such resulting construction having been subjected to a temperature of from about 320* F. to 450* F. for, inversely, a time of from about 0.5 seconds to 10 minutes.
Claim 2
Dependent Claim
16 words
The fiberboard construction of claim 2 wherein said liner is a sheet member of claim 1.
Claim 3
Dependent Claim
12 words
A box blank prepared from a corrugated fiberboard construction of claim 2.
Claim 4
Dependent Claim
12 words
A box blank prepared from a corrugated fiberboard construction of claim 3.
References Cited (Backward Citations)
US2711961A
Cited
US3431162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |