US2987640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric lamp envelope
Assignee: General Electric Co
•
Filing: 1959-11-24
•
Granted: 1961-06-06
•
Expires: 1979-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Paolino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:57
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/26; H01J9/261; H01J5/00; H01J5/02; H01J61/00; H01J61/02; H01J61/04; H01J61/10; H01J61/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR959678A
Cited
US1984215A
Cited
US2089567A
Cited
US2255431A
Cited
US2643020A
Cited
US2555749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |