Patent US1688136A successfully refreshed from Google Patents.
US1688136A
Expired / Lapsed
US
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Dental tool holder
Assignee: Chayes Dental Instrument Corp
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Filing: 1925-10-10
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Granted: 1928-10-16
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Expires: 1945-10-10
Abstract
No abstract record available.
Inventors
- 👤 Herman E S Chayes
- 👤 August P Jurgensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:48
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/14; A61C1/141; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761
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) | 1931-10-16 | 1932-04-16 | 1932-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-10-16 | 1936-04-16 | 1936-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-10-16 | 1940-04-16 | 1940-10-16 | $7700.00 | Window Closed / Lapsed |