Patent US2638301A successfully refreshed from Google Patents.
US2638301A
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US
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Attachment structure for laboratory clamps
Assignee: Individual
•
Filing: 1947-01-28
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Granted: 1953-05-12
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Expires: 1967-01-28
Abstract
No abstract record available.
Inventors
- 👤 Donald M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:56
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/50; Y; Y10; Y10T; Y10T24/00; Y10T24/14; Y10T24/1412; Y10T24/1427; Y10T24/34; Y10T24/3427; Y10T24/3428; Y10T24/3431; Y10T403/00; Y10T403/71; Y10T403/7105; Y10T403/7129; Y10T403/7141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |