BG plc
39Patents
0Active
39Granted
39Portfolio score
Filing activity: Mar 28, 1996 → Nov 6, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6031371A | Self-powered pipeline vehicle for carrying out an operation on a pipeline and method | Mechanical Engineering; Lighting; Heating | 177 | Expired |
| US5971404A | Self-centering suspension for in-pipe use | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5992897A | Joining lined pipe items | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6241875A | Method of providing heat | Chemistry; Metallurgy | 20 | Expired |
| US6008780A | Diver communication equipment | Physics | 18 | Expired |
| US6047589A | Apparatus for measuring a gas value | Physics | 17 | Expired |
| US6116082A | Method and apparatus for testing a fluid conduit system for leaks | Physics | 13 | Expired |
| US6148864A | Permitting two adjacent pipe lengths to be joined together | Performing Operations; Transporting | 12 | Expired |
| US5997278A | Apparatus for providing an air/fuel mixture to a fully premixed burner | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US6005229A | Cooking oven including a convection heat source and a microwave heat source | Electricity | 12 | Expired |
| US5921707A | Method of filling an excavated opening | Fixed Constructions | 11 | Expired |
| US6110614A | Electric power generation system using fuel cells | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5984664A | Apparatus for providing an air/fuel mixture to a fully premixed burner | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5993516A | Adsorbents for separating nitrogen from a feed gas | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6111155A | Method of producing gas hydrate in two or more hydrate forming regions | Chemistry; Metallurgy | 10 | Expired |
| USRE36859E | Method for lining a pipe or main | General | 9 | Expired |
| US6199432A | Fluid pressure testing | Physics | 9 | Expired |
| US6062264A | Installing a pipe in an existing pipeline | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US6354568B1 | Sliding plate valve | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US6102624A | Method and apparatus for installing a replacement pipe | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5967698A | Permitting two adjacent pipe lengths to be joined together | Performing Operations; Transporting | 8 | Expired |
| US5888331A | Joining bodies of thermoplastic material | Performing Operations; Transporting | 8 | Expired |
| US6100074A | Mutant mono-oxygenase cytochrome P-450 .sub.cam | Chemistry; Metallurgy | 7 | Expired |
| US6171435A | Method of installing pipes | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6505501B1 | Apparatus and method for use in testing gas pressure reduction equipment | Mechanical Engineering; Lighting; Heating | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.