US2748382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively responsive indicator
Assignee: Smith-Meeker Engineering Co
•
Filing: 1952-11-22
•
Granted: 1956-05-29
•
Expires: 1972-11-22
Abstract
No abstract record available.
Inventors
- 👤 Ellsworth H Hults
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:01
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/02; H04H60/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US518037A
Cited
US1399728A
Cited
US1783122A
Cited
US2096954A
Cited
US1900911A
Cited
US2094122A
Cited
US2074066A
Cited
US2140126A
Cited
US2132277A
Cited
US2300954A
Cited
US2591555A
Cited
US2600938A
Cited
US2617870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |