Patent US2764306A successfully refreshed from Google Patents.
US2764306A
Expired / Lapsed
US
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Back hoe excavator
Assignee: LA Young Spring and Wire Corp
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Filing: 1953-04-16
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Granted: 1956-09-25
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Expires: 1973-04-16
Abstract
No abstract record available.
Inventors
- 👤 Evan E Dorkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:12
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/407; E02F3/38; E02F3/382; E02F3/384; Y; Y10; Y10S; Y10S37/00; Y10S37/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1590662A
Cited
US2106402A
Cited
US2418251A
Cited
US2687586A
Cited
US2678741A
Cited
US2669367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |