Patent US2432491A successfully refreshed from Google Patents.
US2432491A
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Apparatus for lamp bulb sealing
Assignee: Hygrade Sylvania Corp
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Filing: 1939-03-06
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Granted: 1947-12-09
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Expires: 1959-03-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:32
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; Y10S264/00; Y10S264/46; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1904214A
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US2048556A
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US2121627A
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US2125316A
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US2203917A
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US2272927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |