Patent US4075107A successfully refreshed from Google Patents.
Patent US2563539A successfully refreshed from Google Patents.
US2563539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
lindsay
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:20
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86477; Y10T137/87096; Y10T137/87917; Y10T137/88046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE22660E
Cited
US910221A
Cited
US2196393A
Cited
US2247964A
Cited
US2292801A
Cited
US2322520A
Cited
US2347201A
Cited
US2367402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |