Patent US1631628A successfully refreshed from Google Patents.
US1631628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring granulated mineral, particularly slate
Assignee: Richardson Co
•
Filing: 1925-07-21
•
Granted: 1927-06-07
•
Expires: 1945-07-21
Abstract
No abstract record available.
Inventors
- 👤 Harry C Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:34
CPC Classifications
E; E04; E04D; E04D7/00; E04D7/005; C; C09; C09C; C09C1/00; C09C1/28; C09C1/32; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/90
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) | 1930-06-06 | 1930-12-06 | 1931-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-06-06 | 1934-12-06 | 1935-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-06-06 | 1938-12-06 | 1939-06-07 | $7700.00 | Window Closed / Lapsed |