US2722448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple cup lamp changer
Assignee: McGill Manufacturing Co Inc
•
Filing: 1950-12-26
•
Granted: 1955-11-01
•
Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Popp Rudolf
- 👤 Marvin C Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:43
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US840102A
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US898696A
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US1757529A
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US2091050A
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US2157563A
Cited
US2131687A
Cited
US2212755A
Cited
US2243106A
Cited
US2615713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |