US720386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating prism structure.
Assignee: Pressed Prism Plate Glass Co
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Filing: 1900-07-12
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Granted: 1903-02-10
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Expires: 1920-07-12
Abstract
No abstract record available.
Inventors
- 👤 Frank L O Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:45
CPC Classifications
F; F21; F21S; F21S11/00; F21S11/002; F21V; F21V5/00; F21V5/08
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) | 1906-02-09 | 1906-08-11 | 1907-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-02-09 | 1910-08-11 | 1911-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-02-09 | 1914-08-11 | 1915-02-10 | $7700.00 | Window Closed / Lapsed |