US3234250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of zinc dialkyl dithiophosphates
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1962-06-29
•
Granted: 1966-02-08
•
Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Helmuth G Schneider
- 👤 Clark James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:22
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/16; C07F9/165; C07F9/17
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
A PROCESS FOR PREPARING A ZINC SALT OF A DIALKYL DITHIOPHOSPHORIC ACID HAVING ALKYL GROUPS IN THE RANGE OF FROM 3 TO 10 CABON ATOMS, WHICH COMPRISES THE STEPS OF PREPARING A SLURRY OF ZINC OXIDE IN A PREVIOUSLY PREPARED QUANTITY OF THE SAID ZINC SALT, IN THE PROPORTION OF 10 PARTS OF ZINC OXIDE AND FROM 5 TO 25 PARTS BY WEIGHT OF THE SAID ZINC SALT, ADDING TO THE SLURRY THE SAID DIALKYL DITHIOPHOSPHORIC ACID IN A QUANTITY CALCULATED TO REACT WITH THE ZINC OXIDE, AND COMPLETING THE REACTION.
References Cited (Backward Citations)
US3086939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |