US2869980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of metals from high-lime carnotite ores
Assignee: Individual
•
Filing: 1955-08-09
•
Granted: 1959-01-20
•
Expires: 1975-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert R Grinstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:03
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE PROCESS COMPRISING FORMING A CLOSED LENGTH OF FLEXIBLE MATERIAL INTO ZIG-ZAG PATTERN SUBSTANTIALLY ''SYMMETRICAL ABOUT A POINT, MOVING THE MATERIAL ABOUT THE POINT WITH A COMPSOITE MOTION INCLUDING ROTATION ABOUT THE POINT AND PROGRESSION WITHIN THE PATTERN ABOUT THE POINT, THE FLEXIBLE MATERIAL BEING SLACKENED AT INTERVALS WITHIN THE PATTERN AND SIMULTANEOUSLY EXPOSING THE MATERIAL TO A TREATING FLUID.
Claim 2
Dependent Claim
60 words
THE PROCESS COMPRISING FORMING A CLOSED LENGTH OF FLEXIBLE MATERIAL INTO ZIG-ZAG PATTERN SUBSTANTIALLY ''SYMMETRICAL ABOUT A POINT, MOVING THE MATERIAL ABOUT THE POINT WITH A COMPSOITE MOTION INCLUDING ROTATION ABOUT THE POINT AND PROGRESSION WITHIN THE PATTERN ABOUT THE POINT, THE FLEXIBLE MATERIAL BEING SLACKENED AT INTERVALS WITHIN THE PATTERN AND SIMULTANEOUSLY EXPOSING THE MATERIAL TO A TREATING FLUID.
References Cited (Backward Citations)
US2769686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |