FR742822A - - Google Patents
Info
- Publication number
- FR742822A FR742822A FR742822DA FR742822A FR 742822 A FR742822 A FR 742822A FR 742822D A FR742822D A FR 742822DA FR 742822 A FR742822 A FR 742822A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
- Solid Thermionic Cathode (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE395537X | 1931-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742822A true FR742822A (en) | 1933-03-17 |
Family
ID=6396858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742822D Expired FR742822A (en) | 1931-09-15 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2049811A (en) |
| FR (1) | FR742822A (en) |
| GB (1) | GB395537A (en) |
| NL (1) | NL40189C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL274464A (en) * | 1961-02-07 |
-
0
- NL NL40189D patent/NL40189C/xx active
- FR FR742822D patent/FR742822A/fr not_active Expired
-
1932
- 1932-09-12 GB GB25305/32A patent/GB395537A/en not_active Expired
- 1932-09-14 US US633080A patent/US2049811A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL40189C (en) | |
| GB395537A (en) | 1933-07-20 |
| US2049811A (en) | 1936-08-04 |