NL28028C - - Google Patents
Info
- Publication number
- NL28028C NL28028C NL28028DA NL28028C NL 28028 C NL28028 C NL 28028C NL 28028D A NL28028D A NL 28028DA NL 28028 C NL28028 C NL 28028C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrolytic Production Of Metals (AREA)
- Solid Thermionic Cathode (AREA)
- Luminescent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE309140X | 1928-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28028C true NL28028C (zh) |
Family
ID=6121936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28028D NL28028C (zh) | 1928-04-05 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1954596A (zh) |
| BE (1) | BE359560A (zh) |
| FR (1) | FR672489A (zh) |
| GB (1) | GB309140A (zh) |
| NL (1) | NL28028C (zh) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2505909A (en) * | 1948-02-26 | 1950-05-02 | Bishop H Russell | Cathode-ray tube with oxide coated cathode |
| US3273005A (en) * | 1963-04-01 | 1966-09-13 | Gen Electric | Electron emitter utilizing nitride emissive material |
-
0
- BE BE359560D patent/BE359560A/xx unknown
- NL NL28028D patent/NL28028C/xx active
-
1929
- 1929-04-04 GB GB10399/29A patent/GB309140A/en not_active Expired
- 1929-04-04 FR FR672489D patent/FR672489A/fr not_active Expired
- 1929-04-05 US US352919A patent/US1954596A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR672489A (fr) | 1929-12-28 |
| US1954596A (en) | 1934-04-10 |
| GB309140A (en) | 1930-08-05 |
| BE359560A (zh) |