US984929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relaying projection apparatus.
Assignee: Bausch and Lomb Inc
•
Filing: 1909-10-23
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Granted: 1911-02-21
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Expires: 1929-10-23
Abstract
No abstract record available.
Inventors
- 👤 Gustav A Hermann Kellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/20; G01C21/22
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) | 1914-02-20 | 1914-08-22 | 1915-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-02-20 | 1918-08-22 | 1919-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-02-20 | 1922-08-22 | 1923-02-21 | $7700.00 | Window Closed / Lapsed |