Patent US4061982A successfully refreshed from Google Patents.
Patent US1941978A successfully refreshed from Google Patents.
US1941978A
Expired / Lapsed
US
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Shockproof x-ray unit
Assignee: WAPPLER ELECTRIC Co Inc
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Filing: 1931-10-31
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Granted: 1934-01-02
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Expires: 1951-10-31
Abstract
No abstract record available.
Inventors
- 👤 Fayer Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:07
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/02
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) | 1937-01-01 | 1937-07-03 | 1938-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-01 | 1941-07-03 | 1942-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-01 | 1945-07-03 | 1946-01-02 | $7700.00 | Window Closed / Lapsed |