Patent US931673A successfully refreshed from Google Patents.
US931673A
Expired / Lapsed
US
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Optical instrument.
Assignee: Individual
•
Filing: 1907-05-03
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Granted: 1909-08-17
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Expires: 1927-05-03
Abstract
No abstract record available.
Inventors
- 👤 Elva J Boyle
- 👤 Zola M Boyle
- 👤 Charles Barry Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:22
CPC Classifications
F; F21; F21V; F21V13/00; F21V13/02; F21V13/04; F21V5/00; F21V5/02; F21V7/00; F21V7/0025; F21S; F21S41/00; F21S41/20; F21S41/28; F21S41/30; F21S41/32; F21S41/323; F21V7/04; F21V7/06
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) | 1912-08-16 | 1913-02-15 | 1913-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-08-16 | 1917-02-15 | 1917-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-08-16 | 1921-02-15 | 1921-08-17 | $7700.00 | Window Closed / Lapsed |