US2922729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing laminated paperboard by treating paper with aqueous solution of a silicate and a sucrose modified urea-formaldehyde resin
Assignee: Diamond Shamrock Corp
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Filing: 1953-04-13
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Granted: 1960-01-26
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Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 John E Dereich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF PREPARING LAMINATED PAPERBOARD, WHICH INCLUDES THE STEP OF APPLYING TO AT LEAST ONE OF A PLURALITY OF PAPER WEBS, AS THE ADHESIVE THEREFOR, A COMPOSITION COMPRISING, IN MAJOR PROPORTION AQUEOUS SILICATE GLASS SOLUTION HAVING SOLIDS CONTENT OF 35-45% AND A NA2O:SIO2 RATIO OF 1:2.5-4, AND, IN MINOR PROPORTION, A SUCROSE-MODIFIED UREA FORMALDEHYDE RESIN.
Claim 2
Independent Claim
56 words
THE METHOD OF PREPARING LAMINATED PAPERBOARD, WHICH INCLUDES THE STEP OF APPLYING TO AT LEAST ONE OF A PLURALITY OF PAPER WEBS, AS THE ADHESIVE THEREFOR, A COMPOSITION COMPRISING, IN MAJOR PROPORTION AQUEOUS SILICATE GLASS SOLUTION HAVING SOLIDS CONTENT OF 35-45% AND A NA2O:SIO2 RATIO OF 1:2.5-4, AND, IN MINOR PROPORTION, A SUCROSE-MODIFIED UREA FORMALDEHYDE RESIN.
References Cited (Backward Citations)
GB386328A
Cited
US2150147A
Cited
US2463148A
Cited
US2465094A
Cited
US2517261A
Cited
US2674584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |