US2955386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a seal for tubular glass enclosures
Assignee: Tung Sol Electric Inc
•
Filing: 1956-12-04
•
Granted: 1960-10-11
•
Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Charles Z Leinkram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:00
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/161; H01; H01J; H01J5/00; H01J5/32; H10W72/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |