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US2809680A
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Chain saw apparatus for producing semi-tubular shapes
Assignee: Dow Chemical Co
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Filing: 1955-01-04
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Granted: 1957-10-15
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Expires: 1975-01-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanton K Nethery
- 👤 William O Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:43
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; B27; B27B; B27B17/00; B27B17/0041; B27B17/0066; Y; Y10; Y10T; Y10T408/00; Y10T408/39; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/647; Y10T83/654; Y10T83/6545; Y10T83/6547; Y10T83/6548; Y10T83/655; Y10T83/6584; Y10T83/6633; Y10T83/707; Y10T83/7264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US17871A
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US81434A
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US111414A
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US186293A
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US397727A
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US1054693A
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US1473961A
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US2751941A
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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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |