US2828038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavating apparatus
Assignee: LA Young Spring and Wire Corp
•
Filing: 1955-08-03
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Granted: 1958-03-25
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Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Evan E Dorkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/42; E02F3/425; E02F3/30; E02F3/306; E02F3/32; E02F3/40; E02F3/407; E02F3/413; E02F3/4135; Y; Y10; Y10S; Y10S37/00; Y10S37/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US198957A
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US771440A
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US1162740A
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US2007704A
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US2314395A
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US2356255A
Cited
US2702137A
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US2678741A
Cited
US2731163A
Cited
US2725996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |