US2765712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breaker traps
Assignee: DOUGLAS G SUTHERLAND
•
Filing: 1952-01-18
•
Granted: 1956-10-09
•
Expires: 1972-01-18
Abstract
No abstract record available.
Inventors
- 👤 Sutherland Daniel Manson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:56
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/22
Claims Analysis
Total Claims: 0
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US2133449A
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US2532885A
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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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |