US3616163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated fiberboard
Assignee: ATTON BOX BOARD CO
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Filing: 1969-07-18
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Granted: 1971-10-26
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Expires: 1989-07-18
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 a modified phenol aldehyde resole resin composition and thereafter bonding corrugated medium to liner members with a thermosetting urea-starch-formaldehyde adhesive system.
Inventors
- 👤 Abraham J Reisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:26
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/002; B32B29/005; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; B32B3/00; B32B3/26; B32B3/28; B32B7/00; B32B7/04; B32B7/12; C08L61/20; C09; C09J; C09J161/00; C09J161/04; C09J161/06; C09J161/20; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; B32B2255/00; B32B2255/12; B32B2255/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
said phenol-formaldehyde resole being characterized by having: a. a water solubility such that a 55 weight percent aqueous solution thereof can be prepared, b. a pH of from about 7 to 9.2 when in the form of an aqueous solution of about 35 weight percent total resin solids, and c. an ash content of less than about 2.5 weight percent (based on a 35 weight percent solution of total resin solids). 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 1000 sq. ft., C. an adhesive comprising a urea-starch-formaldehyde system characterized by:
Claim 2
Dependent Claim
17 words
containing at least about 1 weight percent (based on total adhesive system solids) of combined formaldehyde, and
Claim 3
Dependent Claim
46 words
The fiberboard construction of claim 1 wherein said liner sheet member contains from about 2 to 10 weight percent (dry weight basis) of said modified phenol-aldehyde resin system and said liner sheet member has a total volatiles content of from about 5 to 10 weight percent.
Claim 4
Dependent Claim
12 words
A box blank prepared from a corrugated fiberboard construction of claim 1.
Claim 5
Dependent Claim
72 words
containing at least about 70 weight percent of starch (based on total adhesive systems solids), D. 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 E. 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 6
Dependent Claim
12 words
A box blank prepared from a corrugated fiberboard construction of claim 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |