Patent US2451073A successfully refreshed from Google Patents.
US2451073A
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Control apparatus
Assignee: Bristol Co
•
Filing: 1944-06-22
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Granted: 1948-10-12
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Expires: 1964-06-22
Abstract
No abstract record available.
Inventors
- 👤 Robert D Cowherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:07
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US312735A
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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) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |