US3337439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic treatment of quartz
Assignee: AT&T Inc
•
Filing: 1964-11-09
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Granted: 1967-08-22
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Expires: 1984-11-09
Abstract
No abstract record available.
Inventors
- 👤 David B Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:04
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/04; Y; Y10; Y10S; Y10S65/00; Y10S65/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A QUARTZ CRYSTAL FOR USE IN A CRYSTAL RESONATOR COMPRISING A QUARTZ CRYSTAL WHICH HAS BEEN TREATED IN AN ELECTRIC FIELD OF AT LEAST 400 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF AT LEAST TEN HOURS WHILE MAINTAINING THE CRYSTAL IN AN ENVIRONMENT HAVING A PRESSURE BELOW 10**--3 MM. HG.
Claim 2
Dependent Claim
55 words
A QUARTZ CRYSTAL FOR USE IN A CRYSTAL RESONATOR COMPRISING A QUARTZ CRYSTAL WHICH HAS BEEN TREATED IN AN ELECTRIC FIELD OF AT LEAST 400 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF AT LEAST TEN HOURS WHILE MAINTAINING THE CRYSTAL IN AN ENVIRONMENT HAVING A PRESSURE BELOW 10**--3 MM. HG.
Claim 3
Independent Claim
82 words
A METHOD FOR PROCESSING QUARTZ MATERIAL WHICH COMPRISES TREATING THE QUARTZ MATERIAL IN AN ELECTRIC FIELD OF AT LEAST 400 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF A LEAST TEN HOURS WHILE MAINTAINING THE MATERIAL IN AN ATMOSPHERE SUBSTANTIALLY FREE OF HYDROGEN AND HAVING LESS THAN 10**--5 MM. HG WATER VAPOR AS MEASURED AT ROOM TEMPERATURE AND THEREAFTER ANNEALING THE QUARTZ MATERIAL AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF AT LEAST FIVE HOURS.
Claim 4
Independent Claim
82 words
A METHOD FOR PROCESSING QUARTZ MATERIAL WHICH COMPRISES TREATING THE QUARTZ MATERIAL IN AN ELECTRIC FIELD OF AT LEAST 400 VOLTS/CM. AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF A LEAST TEN HOURS WHILE MAINTAINING THE MATERIAL IN AN ATMOSPHERE SUBSTANTIALLY FREE OF HYDROGEN AND HAVING LESS THAN 10**--5 MM. HG WATER VAPOR AS MEASURED AT ROOM TEMPERATURE AND THEREAFTER ANNEALING THE QUARTZ MATERIAL AT A TEMPERATURE OF AT LEAST 400*C. FOR A PERIOD OF AT LEAST FIVE HOURS.
Claim 5
Dependent Claim
23 words
THE METHOD OF CLAIM 2 WHEREIN THE ATMOSPHERE IS A DRY GAS SELECTED FROM THE GROUP CONSISTING OF NEON, ARGON, NITROGEN, AND OXYGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |