Patent US2833199A successfully refreshed from Google Patents.
US2833199A
Expired / Lapsed
US
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Overhead lighting, sound-absorbing, heating, and air conditioning
Assignee: WAKEFIELD Co
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Filing: 1954-02-23
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Granted: 1958-05-06
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 George P Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/068; E; E04; E04B; E04B9/00; E04B9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1652347A
Cited
US2172771A
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FI24700A
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US2550810A
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US2683408A
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US2659807A
Cited
US2655348A
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US2701998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |