Patent US3497133A successfully refreshed from Google Patents.
US3497133A
Expired / Lapsed
US
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Combination electrical and pneumatic power supply
Assignee: Stewart and Stevenson Services Inc
•
Filing: 1968-08-28
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Granted: 1970-02-24
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Expires: 1988-08-28
Abstract
No abstract record available.
Inventors
- 👤 Ezra E Childress
- 👤 George R Witte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:39
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733661A
Cited
US887252A
Cited
US2009001A
Cited
US2130957A
Cited
US3196341A
Cited
US3345517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |