US3749562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making dry reed switches
Assignee: CO IND FRANCOISE TUBES ELECTRO
•
Filing: 1972-03-15
•
Granted: 1973-07-31
•
Expires: 1992-03-15
Abstract
Abstract A dry reed switch is provided with a metal tube penetrating into one of the ends of the switch envelope and carrying at its end a small glass tube. The free end of this latter tube is susceptible of melting under the action of infrared rays so as to close the envelope of the switch after evacuation thereof.
Inventors
- 👤 M Nicolas
- 👤 J Alison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/40
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |