US2831635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random information counting apparatus
Assignee: Individual
•
Filing: 1956-03-21
•
Granted: 1958-04-22
•
Expires: 1976-03-21
Abstract
No abstract record available.
Inventors
- 👤 Charles F Strandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:44
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/02; D; D03; D03J; D03J1/00; D03J2700/00; D03J2700/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |