Patent US2821634A successfully refreshed from Google Patents.
US2821634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube head for hazardous locations
Assignee: Picker X Ray Corp
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Filing: 1953-09-01
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Granted: 1958-01-28
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Expires: 1973-09-01
Abstract
No abstract record available.
Inventors
- 👤 George B Myers
- 👤 Richard W Cobean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/54
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |