US2831435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumps
Assignee: Hobbs Transmission Ltd
•
Filing: 1956-01-09
•
Granted: 1958-04-22
•
Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 Hobbs Howard Frederick
- 👤 Allen Anthony Rex Hepburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US89269A
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US159599A
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US212067A
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US1563583A
Cited
US1590964A
Cited
US1947551A
Cited
US2035326A
Cited
US2287318A
Cited
US2272388A
Cited
US2464347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |