Patent US3787276A successfully refreshed from Google Patents.
US3787276A
Expired / Lapsed
US
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Corrugated cardboard containing sulphur foam
Assignee: Individual
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Filing: 1971-04-12
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Granted: 1974-01-22
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Expires: 1991-04-12
Abstract
Abstract This invention relates to a new elementary material which is a corrugated cardboard comprising a corrugated sheet, made of cellulosic material, with parallel corrugation, covered with at least one coating sheet and in which at least a part of the space between a face of said corrugated sheet and the corresponding coating sheet comprises a sulphur foam. The invention also relates to a process of manufacturing the above defined material.
Inventors
- 👤 G Jacquelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:44
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2886; B32B5/00; B32B5/18; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D65/00; B65D65/38; B65D65/40; B65D65/403; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; E04C2/30; E04C2/32; E04C2/322; E04C2/34; E04C2/3405; B32B2305/00; B32B2305/02; B32B2305/028; E04C2002/3444; E04C2002/3466; E04C2002/3494; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24694; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984
Claims Analysis
Total Claims: 0
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |