US2569281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact mechanism for automatic circuit breakers and similar electrical switchgear
Assignee: JA Crabtree and Co Ltd
•
Filing: 1948-08-09
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Granted: 1951-09-25
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Expires: 1968-08-09
Abstract
No abstract record available.
Inventors
- 👤 Besag Ernst
- 👤 Hill Walter Edward
- 👤 Wintle Thomas Daniel Guy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/02; H01H71/0207; C; C10; C10H; C10H13/00; F; F16; F16F; F16F15/00; F16F15/02; F16F15/04; F16F15/08; H01H3/00; H01H3/32; H01H3/50; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H50/22; H01H71/10; H01H71/12; H01H71/40; H01H71/44; H01H73/00; H01H73/02; H01H73/04
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |