Patent US2544554A successfully refreshed from Google Patents.
US2544554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mounting for photoelectric cells
Assignee: Individual
•
Filing: 1948-03-26
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Granted: 1951-03-06
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Expires: 1968-03-26
Abstract
No abstract record available.
Inventors
- 👤 Oscar J Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:44
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946681A
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US1764368A
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GB353172A
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US1948766A
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GB367036A
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US1963692A
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US2055017A
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US2148023A
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US2041816A
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US2031646A
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US2448516A
Cited
US2493919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |