US3490886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing glass to metal seals using two sealing gas pressures
Assignee: Individual
•
Filing: 1966-06-16
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Granted: 1970-01-20
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Milton Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:40
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/32; C; C03; C03B; C03B23/00; C03B23/20; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1904; G05D23/20; G05D23/22
Claims Analysis
Total Claims: 0
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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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |