Patent US3248187A successfully refreshed from Google Patents.
US3248187A
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Alkenyl dicarboxylic acid lactones, their method of preparation and utility
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-12-22
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Granted: 1966-04-26
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles E Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D309/00; C07D309/16; C07D309/28; C07D309/30; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/1883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A HYDROCARBON OIL BOILING IN THE RANGE BETWEEN ABOUT 75 AND 900*F. AND CONTAINING AN AMOUNT SUFFICIENT TO INHIBIT THE CORROSION OF METALS OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
32 words
A HYDROCARBON OIL BOILING IN THE RANGE BETWEEN ABOUT 75 AND 900*F. AND CONTAINING AN AMOUNT SUFFICIENT TO INHIBIT THE CORROSION OF METALS OF AN ADDITIVE SELECTED FROM THE GROUP CONSISTING OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |