Patent DE7420248U successfully refreshed from Google Patents.
US636213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speculum.
Assignee: Individual
•
Filing: 1899-02-21
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Granted: 1899-10-31
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Expires: 1919-02-21
Abstract
No abstract record available.
Inventors
- 👤 William C Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/31
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) | 1902-10-31 | 1903-05-02 | 1903-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-10-31 | 1907-05-02 | 1907-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-10-31 | 1911-05-02 | 1911-11-01 | $7700.00 | Window Closed / Lapsed |