US650234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making carborundum articles.
Assignee: Individual
•
Filing: 1899-08-07
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Granted: 1900-05-22
•
Expires: 1919-08-07
Abstract
No abstract record available.
Inventors
- 👤 Francis A J Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/565
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) | 1903-05-22 | 1903-11-21 | 1904-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-05-22 | 1907-11-21 | 1908-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-05-22 | 1911-11-21 | 1912-05-22 | $7700.00 | Window Closed / Lapsed |