US2636983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse analyzer
Assignee: National Research Development Corp UK
•
Filing: 1948-05-20
•
Granted: 1953-04-28
•
Expires: 1968-05-20
Abstract
No abstract record available.
Inventors
- 👤 Michael J Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
H; H03; H03K; H03K21/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2008563A
Cited
US1801657A
Cited
US2468058A
Cited
US2418718A
Cited
US2522551A
Cited
US2484352A
Cited
US2492134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |