US2669478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulb changing device
Assignee: Individual
•
Filing: 1950-05-22
•
Granted: 1954-02-16
•
Expires: 1970-05-22
Abstract
No abstract record available.
Inventors
- 👤 Benjamin T Bowie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:34
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/003; H01J9/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1790761A
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US977158A
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US1201506A
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US1202432A
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US1482653A
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US1541839A
Cited
US2116651A
Cited
US2367003A
Cited
US2385820A
Cited
US2407331A
Cited
US2543607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |