US2435715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating fixture
Assignee: PITTSBURGH REFLECTOR Co
•
Filing: 1944-06-23
•
Granted: 1948-02-10
•
Expires: 1964-06-23
Abstract
No abstract record available.
Inventors
- 👤 William W Headings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:06
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/06; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935729A
Cited
US2142395A
Cited
US2309676A
Cited
US2303747A
Cited
US2280534A
Cited
US2298961A
Cited
US2350462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |