Patent US923571A successfully refreshed from Google Patents.
US923571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp-agitator.
Assignee: RAPID CYANIDE EXTRACTION Co
•
Filing: 1908-07-23
•
Granted: 1909-06-01
•
Expires: 1928-07-23
Abstract
No abstract record available.
Inventors
- 👤 William Campbell Paterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/45; B01F23/452; B01F23/50; B01F23/56; B01F25/00; B01F25/20; B01F25/21; B01F25/211; B01F25/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1912-05-31 | 1912-11-30 | 1913-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-05-31 | 1916-11-30 | 1917-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-05-31 | 1920-11-30 | 1921-06-01 | $7700.00 | Window Closed / Lapsed |