Patent US2221345A successfully refreshed from Google Patents.
US971679A
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US
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Attachment for drilling, boring, and similar machines.
Assignee: Individual
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Filing: 1909-06-07
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Granted: 1910-10-04
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Expires: 1929-06-07
Abstract
No abstract record available.
Inventors
- 👤 Frank A Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:28
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/16; B60S1/18; B60S1/185; B66; B66D; B66D1/00; B66D1/02; B66D1/14; B66D1/24; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/6776; Y10T408/6779; Y10T82/00; Y10T82/25; Y10T82/2552; Y10T82/2554; Y10T82/2556
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1913-10-03 | 1914-04-04 | 1914-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-10-03 | 1918-04-04 | 1918-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-10-03 | 1922-04-04 | 1922-10-04 | $7700.00 | Window Closed / Lapsed |