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US2921634A
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Assignee: National Supply Co
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Filing: 1957-11-12
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Granted: 1960-01-19
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Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 Peter S Bloudoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/06; Y; Y10; Y10S; Y10S285/00; Y10S285/92; Y10S285/922; Y10T; Y10T403/00; Y10T403/60; Y10T403/602; Y10T403/70; Y10T403/7005; Y10T403/7007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US931327A
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US1849101A
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US1851843A
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US2321215A
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US2328988A
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US2327951A
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US2684839A
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US2671682A
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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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |