US689933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocking or mounting lenses for grinding.
Assignee: SPENCER OPTICAL MANUFACTURING Co
•
Filing: 1900-12-22
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Granted: 1901-12-31
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Expires: 1920-12-22
Abstract
No abstract record available.
Inventors
- 👤 John H Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:06
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005; Y; Y10; Y10S; Y10S359/00; Y10S359/90
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) | 1904-12-30 | 1905-07-01 | 1905-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-12-30 | 1909-07-01 | 1909-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-12-30 | 1913-07-01 | 1913-12-31 | $7700.00 | Window Closed / Lapsed |