NL39798C - - Google Patents
Info
- Publication number
- NL39798C NL39798C NL67921A NL67921A NL39798C NL 39798 C NL39798 C NL 39798C NL 67921 A NL67921 A NL 67921A NL 67921 A NL67921 A NL 67921A NL 39798 C NL39798 C NL 39798C
- 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
- H01J9/047—Cathodes having impregnated bodies
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US678426A US2041802A (en) | 1933-06-30 | 1933-06-30 | Electron emitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL39798C true NL39798C (de) | 1937-01-15 |
Family
ID=24722735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL67921A NL39798C (de) | 1933-06-30 | 1933-12-27 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2041802A (de) |
| DE (1) | DE667942C (de) |
| FR (1) | FR768485A (de) |
| GB (1) | GB430169A (de) |
| NL (1) | NL39798C (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2457515A (en) * | 1941-11-13 | 1948-12-28 | Bell Telephone Labor Inc | Insulating coating compositions and method of making |
| US2486955A (en) * | 1943-11-12 | 1949-11-01 | Atomic Energy Commission | Producing thin film of metal oxide |
| US2558491A (en) * | 1947-08-19 | 1951-06-26 | Hartford Nat Bank & Trust Co | Method of manufacturing electric discharge tubes |
| US2506466A (en) * | 1947-08-28 | 1950-05-02 | Bishop H Russell | Electron emitters |
| NL78158C (de) * | 1949-03-17 | |||
| US2631945A (en) * | 1949-11-19 | 1953-03-17 | Bell Telephone Labor Inc | Cold cathode and method of preparing same |
| US2686735A (en) * | 1951-01-03 | 1954-08-17 | Rca Corp | Cathode material |
| US2744838A (en) * | 1951-11-03 | 1956-05-08 | Gen Electric | Electron discharge device cathode and method of making same |
| US2764511A (en) * | 1953-08-28 | 1956-09-25 | Sylvania Electric Prod | Filamentary cathode and method of making same |
| US2809323A (en) * | 1954-03-24 | 1957-10-08 | Gen Electric | Penetrating ray transducer |
| US2950993A (en) * | 1956-04-02 | 1960-08-30 | Rca Corp | Oxide coated cathodes and method of manufacture |
| US3102827A (en) * | 1960-08-10 | 1963-09-03 | Premier Ind Corp | Welding rod |
| US3058210A (en) * | 1960-08-23 | 1962-10-16 | Sperry Rand Corp | Sealing mixture and method |
| NL136982C (de) * | 1961-06-01 | |||
| US3850683A (en) * | 1973-06-12 | 1974-11-26 | Koppers Co Inc | Iron stain inhibitors |
-
1933
- 1933-06-30 US US678426A patent/US2041802A/en not_active Expired - Lifetime
- 1933-12-14 GB GB35202/33A patent/GB430169A/en not_active Expired
- 1933-12-27 NL NL67921A patent/NL39798C/xx active
-
1934
- 1934-02-10 FR FR768485D patent/FR768485A/fr not_active Expired
- 1934-04-21 DE DEI49542D patent/DE667942C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR768485A (fr) | 1934-08-07 |
| US2041802A (en) | 1936-05-26 |
| GB430169A (en) | 1935-06-14 |
| DE667942C (de) | 1938-11-23 |