US663868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of wood-pulp.
Assignee: Individual
•
Filing: 1899-01-03
•
Granted: 1900-12-18
•
Expires: 1919-01-03
Abstract
No abstract record available.
Inventors
- 👤 Francis Charles Crean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12
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) | 1903-12-18 | 1904-06-18 | 1904-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-12-18 | 1908-06-18 | 1908-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-12-18 | 1912-06-18 | 1912-12-18 | $7700.00 | Window Closed / Lapsed |