US1254741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical instrument.
Assignee: CROWN OPTICAL Co
•
Filing: 1917-01-08
•
Granted: 1918-01-29
•
Expires: 1937-01-08
Abstract
No abstract record available.
Inventors
- 👤 Charles H Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:49
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10
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) | 1921-01-28 | 1921-07-30 | 1922-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-01-28 | 1925-07-30 | 1926-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-01-28 | 1929-07-30 | 1930-01-29 | $7700.00 | Window Closed / Lapsed |