US2740570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for exhausting and sealing-off lamp envelopes
Assignee: General Electric Co
•
Filing: 1953-09-28
•
Granted: 1956-04-03
•
Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Breadner Robert Leonard
- 👤 Simms Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:12
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; Y; Y10; Y10S; Y10S53/00; Y10S53/03; Y10S53/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US239058A
Cited
US1430118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |