US2873510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing seals for electric discharge tubes
Assignee: US Philips Corp
•
Filing: 1955-09-06
•
Granted: 1959-02-17
•
Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 Duran Johannes Christian
- 👤 Bakker Martinus Antonius Maria
- 👤 Pieter Geert Van Zanten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/046; H; H01; H01J; H01J5/00; H01J5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF PROVIDING A METAL CONTACT MEMBER SEALED IN A GLASS WALL OF A DISCHARGE TUBE, COMPRISING THE STEPS OF COATING SAID METAL MEMBER WITH A LAYER CONSISTING OF AUCU; PLACING A PORTION OF SAID COATED METAL MEMBER IN CONTACT WITH SAID GLASS WALL; THEREAFTER HEATING THE MEMBER TO CONVERT A PORTION OF THE COPPER IN SAID AUCU INTO A THIN EXTERNAL LAYER OF COPPER OXIDE AND SIMULTA-
Claim 2
Independent Claim
69 words
A METHOD OF PROVIDING A METAL CONTACT MEMBER SEALED IN A GLASS WALL OF A DISCHARGE TUBE, COMPRISING THE STEPS OF COATING SAID METAL MEMBER WITH A LAYER CONSISTING OF AUCU; PLACING A PORTION OF SAID COATED METAL MEMBER IN CONTACT WITH SAID GLASS WALL; THEREAFTER HEATING THE MEMBER TO CONVERT A PORTION OF THE COPPER IN SAID AUCU INTO A THIN EXTERNAL LAYER OF COPPER OXIDE AND SIMULTA-
References Cited (Backward Citations)
US1140134A
Cited
US1498908A
Cited
US1575994A
Cited
US2229436A
Cited
US2520663A
Cited
US2426467A
Cited
US2555877A
Cited
US2446277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |