US2643593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing multiply metalfoil-cardboard material and of producing articles formed of such material
Assignee: New Merton Board Mills Ltd
•
Filing: 1948-10-30
•
Granted: 1953-06-30
•
Expires: 1968-10-30
Abstract
No abstract record available.
Inventors
- 👤 Lenard Frederick Pyne
- 👤 Methven Geoffrey William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:58
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/02; D21H19/04; B; B65; B65D; B65D3/00; B65D3/22; B65D65/00; B65D65/38; B65D65/40; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF PRODUCING MULTI-PLY METAL-FOILCARDBOARD MATERIAL COMPRISING FIRST FORMING A COMPOSITE WEB OF CARDBOARD PERMEABLE BY FORMALDEHYDE AND AN IMPERMEABLE METAL FOIL BY ADHESIVELY JOINING THE TWO IN FACE-TO-FACE RELATIONSHIP BY MEANS OF A LIQUID SOLUBLE ADHESIVE WHICH IS CONVERTIBLE TO A WATER INSOLUBLE COMPLEX BY TREATMENT WITH FORMALDEHYDE, THEN APPLYING PRECONDENSED FORMALDEHYDE RESIN ADHESIVE CONTAINING UNCONDENSED FORMALDEHYDE TO THE THEN EXPOSED FACE OF THE CARDBOARD, AND THEN SUBJECTING THE COMPOSITE WEB TO TEMPERATURE CONDITIONS FOR A DURATION OF TIME DEPENDENT UPON SUCH TEMPERATURE; THE TIME BEING OF RELATIVELY LONG DURATION IN THE PRESENCE OF RELATIVELY LOW TEMPERATURES SUCH AS ROOM TEMPERATURES AND OF RELATIVELY SHORTER DURATION IN THE PRESENCE OF RELATIVELY HIGHER TEMPERATURES.
Claim 2
Independent Claim
115 words
A METHOD OF PRODUCING MULTI-PLY METAL-FOILCARDBOARD MATERIAL COMPRISING FIRST FORMING A COMPOSITE WEB OF CARDBOARD PERMEABLE BY FORMALDEHYDE AND AN IMPERMEABLE METAL FOIL BY ADHESIVELY JOINING THE TWO IN FACE-TO-FACE RELATIONSHIP BY MEANS OF A LIQUID SOLUBLE ADHESIVE WHICH IS CONVERTIBLE TO A WATER INSOLUBLE COMPLEX BY TREATMENT WITH FORMALDEHYDE, THEN APPLYING PRECONDENSED FORMALDEHYDE RESIN ADHESIVE CONTAINING UNCONDENSED FORMALDEHYDE TO THE THEN EXPOSED FACE OF THE CARDBOARD, AND THEN SUBJECTING THE COMPOSITE WEB TO TEMPERATURE CONDITIONS FOR A DURATION OF TIME DEPENDENT UPON SUCH TEMPERATURE; THE TIME BEING OF RELATIVELY LONG DURATION IN THE PRESENCE OF RELATIVELY LOW TEMPERATURES SUCH AS ROOM TEMPERATURES AND OF RELATIVELY SHORTER DURATION IN THE PRESENCE OF RELATIVELY HIGHER TEMPERATURES.
References Cited (Backward Citations)
US1994050A
Cited
US2403995A
Cited
US1862301A
Cited
US2141313A
Cited
US2285053A
Cited
US2262770A
Cited
US2381460A
Cited
US2337656A
Cited
US2320764A
Cited
US2443197A
Cited
US2444314A
Cited
US2568463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |