Patent US2882777A successfully refreshed from Google Patents.
US2882777A
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Hydraulic tracing apparatus
Assignee: Leland Gifford Co
•
Filing: 1955-11-03
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Granted: 1959-04-21
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Eric J Hirvonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:39
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/18; B23Q35/24; B23Q35/26; B23Q35/36; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2526487A
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US2603117A
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US2464626A
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US2695543A
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GB684809A
Cited
US2729130A
Cited
GB738446A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |