Patent US2509998A successfully refreshed from Google Patents.
US2509998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsing arrangement
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-04-26
•
Granted: 1950-05-30
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Mark Jan Van Der
- 👤 Venis Adolph
- 👤 Roszbach George Philip
- 👤 Blok Laurens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; H; H03; H03K; H03K3/00; H03K3/02; H03K3/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US120900A
Cited
US2143397A
Cited
US2172324A
Cited
US2235190A
Cited
GB498577A
Cited
FR836876A
Cited
US2226752A
Cited
US2293449A
Cited
US2297522A
Cited
US2305395A
Cited
US2274369A
Cited
US2416302A
Cited
US2340407A
Cited
US2329137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |