Patent US2991571A successfully refreshed from Google Patents.
US2991571A
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US
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Ditching attachment for chain saws
Assignee: Individual
•
Filing: 1958-11-05
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Granted: 1961-07-11
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Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Alex J Hyster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:21
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/10; E02F3/12; E02F3/14; E02F3/142; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1067328A
Cited
US1886382A
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US2348588A
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US2718908A
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US2748810A
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US2783794A
Cited
US2835055A
Cited
US2821216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |