Patent FR335946A successfully refreshed from Google Patents.
Patent US2854103A successfully refreshed from Google Patents.
US2854103A
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Light-shielding grid
Assignee: A L SMITH IRON Co
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Filing: 1953-05-25
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Granted: 1958-09-30
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Expires: 1973-05-25
Abstract
No abstract record available.
Inventors
- 👤 Kruger Michael Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:35
CPC Classifications
F; F21; F21V; F21V11/00; E; E04; E04B; E04B2/00; E04C; E04C2/00; E04C2/30; E04C2/42; F16; F16B; F16B7/00; F16B7/04; F21V11/06; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US470066A
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US563529A
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US1036240A
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US1113678A
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US1468786A
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US2119946A
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US2211586A
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US2670429A
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US2577119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |