US2989558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organolead compounds
Assignee: Ethyl Corp
•
Filing: 1958-11-03
•
Granted: 1961-06-20
•
Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Sidney M Blitzer
- 👤 Tillmon H Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS WHEREIN AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS IA, IIA, IIB, IIIA AND IVB OF THE PERIODIC SYSTEM OF THE ELEMENTS IS REACTED WITH A LEAD CHALKOGEN SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES AND SULFIDES, THE IMPROVEMENT WHICH COMPRISES ADDING SAID ORGANOMETALLIC COMPOUND TO THE LEAD CHALKOGEN OVER A PERIOD OF AT LEAST ABOUT 10 MINUTES.
Claim 2
Dependent Claim
69 words
IN A PROCESS WHEREIN AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS IA, IIA, IIB, IIIA AND IVB OF THE PERIODIC SYSTEM OF THE ELEMENTS IS REACTED WITH A LEAD CHALKOGEN SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES AND SULFIDES, THE IMPROVEMENT WHICH COMPRISES ADDING SAID ORGANOMETALLIC COMPOUND TO THE LEAD CHALKOGEN OVER A PERIOD OF AT LEAST ABOUT 10 MINUTES.
References Cited (Backward Citations)
US2786860A
Cited
US2859225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |