Glass balloons and method for making same
US4026499A · kind A · utility
6Cited by
5References
9Claims
0Family size
Inventor
Key dates
| Filing date | Mar 15, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Mar 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/804
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass balloon that floats in air. An assembly of glass balloons that form a slab of foam that floats in air. A process for making glass balloons employing: two nested furnaces, pre-heated helium, a moving furnace, and a refrigerated seal-off chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.