US6690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alfred g
Assignee: —
•
Filing: —
•
Granted: 1849-09-04
•
Expires: 1866-09-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:47
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/04; Y; Y10; Y10S; Y10S100/00; Y10S100/902; Y10S241/00; Y10S241/17
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) | 1852-09-03 | 1853-03-05 | 1853-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-09-03 | 1857-03-05 | 1857-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-09-03 | 1861-03-05 | 1861-09-04 | $7700.00 | Window Closed / Lapsed |