US2828359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling devices
Assignee: National Pneumatic Co Inc
•
Filing: 1952-11-26
•
Granted: 1958-03-25
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Eric E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:23
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/02; H04M11/027; H01; H01H; H01H13/00; H01H13/02; H01H13/023; H01H9/00; H01H9/02; H01H9/0214
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2066022A
Cited
US2142993A
Cited
US2262170A
Cited
US2273353A
Cited
US2305681A
Cited
US2452830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |