US2613249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing instrument
Assignee: J Lyons and Co Ltd
•
Filing: 1948-12-23
•
Granted: 1952-10-07
•
Expires: 1968-12-23
Abstract
No abstract record available.
Inventors
- 👤 Symonds Alfred Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:35
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/10; G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878109A
Cited
US2146073A
Cited
US2266114A
Cited
US2422742A
Cited
US2387496A
Cited
US2516768A
Cited
US2512372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |