Patent US1899868A successfully refreshed from Google Patents.
US1899868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable convertible lamp
Assignee: Individual
•
Filing: 1930-04-02
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Granted: 1933-02-28
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Expires: 1950-04-02
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Herlbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:58
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/02; F21L; F21L2/00; F21L4/00
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) | 1936-02-28 | 1936-08-29 | 1937-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-28 | 1940-08-29 | 1941-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-28 | 1944-08-29 | 1945-02-28 | $7700.00 | Window Closed / Lapsed |