US2268510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp sealing apparatus
Assignee: Hygrade Sylvania Corp
•
Filing: 1941-01-02
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Granted: 1941-12-30
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Expires: 1961-01-02
Abstract
No abstract record available.
Inventors
- 👤 August E Kulberg
- 👤 Ralph B Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:33
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J5/22; H01J5/24; H01J2893/00; H01J2893/0033; H01J2893/0037; H01J2893/0038; H01J2893/0039; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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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) | 1944-12-29 | 1945-06-30 | 1945-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-29 | 1949-06-30 | 1949-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-29 | 1953-06-30 | 1953-12-30 | $7700.00 | Window Closed / Lapsed |