US1262173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for neutralizing static electricity.
Assignee: CHAPMAN ELECTRIC NEUTRALIZER Co
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Filing: 1917-04-21
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Granted: 1918-04-09
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Expires: 1937-04-21
Abstract
No abstract record available.
Inventors
- 👤 William H Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:41
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/04
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) | 1921-04-08 | 1921-10-08 | 1922-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-04-08 | 1925-10-08 | 1926-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-04-08 | 1929-10-08 | 1930-04-09 | $7700.00 | Window Closed / Lapsed |