US2980031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Peters and Russell Inc
•
Filing: 1958-06-25
•
Granted: 1961-04-18
•
Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Linus E Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:03
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/106; F04B53/1065; F04B11/00; F04B11/0008; F04B11/0016; F04B43/00; F04B43/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US111961A
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US1301282A
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US1447074A
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US1944340A
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US1965497A
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US2117563A
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US2287841A
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US2625113A
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US2687696A
Cited
US2873688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |