Patent US3420439A successfully refreshed from Google Patents.
US3420439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Comfort conditioning system
Assignee: Lithonia Lighting Inc
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Filing: 1967-01-05
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Granted: 1969-01-07
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Expires: 1987-01-05
Abstract
No abstract record available.
Inventors
- 👤 Gershon Meckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/04; F24F13/06; F24F13/078; F24F13/26; F24F3/00; F24F3/044; F24F3/056; F24F2221/00; F24F2221/02; F24F2221/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2575907A
Cited
US2884228A
Cited
US3065686A
Cited
US3114505A
Cited
US3361157A
Cited
US3318225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |