Patent US3440947A successfully refreshed from Google Patents.
US3440947A
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Combination diffuser and false ceiling suspension systems
Assignee: Philips Industries Inc
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Filing: 1966-09-19
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Granted: 1969-04-29
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Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Averill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:43
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/02; E04B9/06; E04B9/12; E04B9/127; F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; Y; Y10; Y10T; Y10T403/00; Y10T403/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2888113A
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US3069991A
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GB994701A
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US3266210A
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US3227063A
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US3177796A
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US3276348A
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US3353473A
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US3331305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |