US3394633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion engine
Assignee: Dresser Industries Inc
•
Filing: 1966-06-27
•
Granted: 1968-07-30
•
Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 William H Payne
- 👤 Ralph E Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/06; F04; F04B; F04B53/00; F04B53/14; F04B53/144; F04B53/146; F25B2400/00; F25B2400/14; F25B2400/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342273A
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US1622813A
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US1575638A
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US1867795A
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US2143586A
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US2120004A
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US2730960A
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US2939753A
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US3016717A
Cited
US3083648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |