US1335000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating metalliferous materials
Assignee: FRANKFORTER
•
Filing: 1913-08-15
•
Granted: 1920-03-30
•
Expires: 1933-08-15
Abstract
No abstract record available.
Inventors
- 👤 Henry B Hovland
- 👤 George B Frankforter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:55
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S209/00; Y10S209/901
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) | 1923-03-30 | 1923-09-29 | 1924-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-30 | 1927-09-29 | 1928-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-30 | 1931-09-29 | 1932-03-30 | $7700.00 | Window Closed / Lapsed |