Patent US1718155A successfully refreshed from Google Patents.
US1718155A
Expired / Lapsed
US
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Electric-light fixture
Assignee: Edw F Caldwell & Co Inc
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Filing: 1928-05-15
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Granted: 1929-06-18
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Expires: 1948-05-15
Abstract
No abstract record available.
Inventors
- 👤 Klehr William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:50
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-06-17 | 1932-12-17 | 1933-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-17 | 1936-12-17 | 1937-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-17 | 1940-12-17 | 1941-06-18 | $7700.00 | Window Closed / Lapsed |