US2991708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined space lighting and ventilating apparatus
Assignee: Day Brite Lighting Inc
•
Filing: 1959-06-19
•
Granted: 1961-07-11
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Harry J Falk
- 👤 Garnett Willard
- 👤 Leo G Stahlhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:27
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/078; F21; F21V; F21V33/00; F21V33/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1406055A
Cited
US2564334A
Cited
US2647985A
Cited
US2683799A
Cited
US2845855A
Cited
US2960602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |