US2963659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Square wave generator
Assignee: HP Inc
•
Filing: 1958-05-13
•
Granted: 1960-12-06
•
Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 Duane E Dunwoodie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:59
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/37; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/46; Y; Y10; Y10S; Y10S84/00; Y10S84/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |