Patent US2701643A successfully refreshed from Google Patents.
US2701643A
Expired / Lapsed
US
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Hydroextractor
Assignee: Individual
•
Filing: 1950-05-05
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Granted: 1955-02-08
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Expires: 1970-05-05
Abstract
No abstract record available.
Inventors
- 👤 Spencer John Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:43
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/08; D06F39/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US454056A
Cited
DE455043C
Cited
GB189705927A
Cited
US739247A
Cited
US1030973A
Cited
GB157974A
Cited
US1848785A
Cited
GB370343A
Cited
US2080874A
Cited
US2271493A
Cited
US2406187A
Cited
US2555268A
Cited
FR77083E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |