Patent US3121641A successfully refreshed from Google Patents.
US3121641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion of preformed homogeneous gaseous mixture to form titanium dioxide pigment
Assignee: Wyeth Holdings LLC
•
Filing: 1962-09-25
•
Granted: 1964-02-18
•
Expires: 1982-09-25
Abstract
No abstract record available.
Inventors
- 👤 John P Wilkswo
- 👤 Earl W Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD OF MANUFACTURING TITANIUM DIOXIDE PIGMENT WHICH COMPRISES BURNING A PREFORMED HOMOGENEOUS GASEOUS COMBUSTION MIXTURE CONTAINING TITANIUM TETRACHLORIDE AND OXYGEN AS PRINCIPAL PGIMENT-PRODUCING COMPONENTS AS A SUBSTANTIALLY FLAT LAMINAR FLAME DIRECTLY AGAINST A DIRECTLY OPPOSING COLUMN OF GAS IN STREAMLINE FLOW.
Claim 2
Independent Claim
42 words
A METHOD OF MANUFACTURING TITANIUM DIOXIDE PIGMENT WHICH COMPRISES BURNING A PREFORMED HOMOGENEOUS GASEOUS COMBUSTION MIXTURE CONTAINING TITANIUM TETRACHLORIDE AND OXYGEN AS PRINCIPAL PGIMENT-PRODUCING COMPONENTS AS A SUBSTANTIALLY FLAT LAMINAR FLAME DIRECTLY AGAINST A DIRECTLY OPPOSING COLUMN OF GAS IN STREAMLINE FLOW.
References Cited (Backward Citations)
US2347496A
Cited
US2445691A
Cited
US2779662A
Cited
US2596421A
Cited
US2635946A
Cited
US2779660A
Cited
US2779661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |