Fiberboard shims and method of making them
US4029846A · kind A · utility
4Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | May 20, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/662
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Shims having improved torque retention, tensile strength, resistance to deformation, and low water absorption are formed from a resin-impregnated, cellulosic fiberboard, soaked in a solution of about 1 to about 20% by volume of methylene-bis-(4-phenyl isocyanate), and cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.