Patent US2874640A successfully refreshed from Google Patents.
US2874640A
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Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-03-11
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Granted: 1959-02-24
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Expires: 1974-03-11
Abstract
No abstract record available.
Inventors
- 👤 Vickers Herbert Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:41
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/084; F02; F02M; F02M69/00; F02M69/46; F02M69/50; F02M2700/00; F02M2700/05; F02M2700/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190403152A
Cited
GB108771A
Cited
US2040847A
Cited
US1973180A
Cited
US1982023A
Cited
US2019650A
Cited
US2047167A
Cited
US2619907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |