Patent US886684A successfully refreshed from Google Patents.
US886684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic ray-filter.
Assignee: SPENCER LENS CO
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Filing: 1908-01-20
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Granted: 1908-05-05
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Expires: 1928-01-20
Abstract
No abstract record available.
Inventors
- 👤 Peter J Dukelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:45
CPC Classifications
G; G03; G03B; G03B11/00
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) | 1911-05-05 | 1911-11-04 | 1912-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-05-05 | 1915-11-04 | 1916-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-05-05 | 1919-11-04 | 1920-05-05 | $7700.00 | Window Closed / Lapsed |