US5053268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite paper
Assignee: Somar Corp
•
Filing: 1989-11-28
•
Granted: 1991-10-01
•
Expires: 2009-11-28
Abstract
Abstract A composite paper suitable for use as writing paper, printing paper or copying paper is disclosed which includes a synthetic resin film having a thickness of 12-30 mu m, and a paper sheet laminated on each side of the synthetic resin film and having a Bekk smoothness of 60-120 seconds, a density of 0.8-1.0 g/cm3, a degree of sizing of 0.5-1.5 seconds and a thickness of 20-25 mu m.
Inventors
- 👤 Ryohei Ehara
- 👤 Masatoshi Tomiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:47
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/28; B32B27/281; B32B27/30; B32B27/302; B32B27/304; B32B27/32; B32B27/34; B32B27/36; B32B27/365; D; D21; D21H; D21H27/00; D21H27/14; D21H27/30; D21H27/32; D21H27/34; D21H27/36; B32B2307/00; B32B2307/70; B32B2307/75; B32B2317/00; B32B2317/12; B32B2323/00; B32B2323/04; B32B2323/10; B32B2325/00; B32B2327/00; B32B2327/06; B32B2367/00; B32B2369/00; B32B2377/00; B32B2379/00; B32B2379/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1066; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31515; Y10T428/31551; Y10T428/31562; Y10T428/31565; Y10T428/31573; Y10T428/31576; Y10T428/3158; Y10T428/31591; Y10T428/31594; Y10T428/31721; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A composite paper comprising a synthetic resin film having a thickness of 16-24 μm, and a sheet of paper laminated on each side of said synthetic resin film and having a Bekk smoothness of 80-100 seconds, a density of 0.82-0.90 g/cm 3 , a degree of sizing of 0.9-1 second and a thickness of 22-24 μm.
Claim 2
Dependent Claim
56 words
A composite paper comprising a synthetic resin film having a thickness of 16-24 μm, and a sheet of paper laminated on each side of said synthetic resin film and having a Bekk smoothness of 80-100 seconds, a density of 0.82-0.90 g/cm 3 , a degree of sizing of 0.9-1 second and a thickness of 22-24 μm.
Claim 3
Dependent Claim
25 words
A composite paper as claimed in claim 1, wherein each of the paper sheets if bonded to the synthetic resin film with an urethane adhesive.
References Cited (Backward Citations)
DE2324862A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |