US1564157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable grid leak
Assignee: Individual
•
Filing: 1924-04-26
•
Granted: 1925-12-01
•
Expires: 1944-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wainwright Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:20
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/301; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-11-30 | 1929-06-01 | 1929-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-11-30 | 1933-06-01 | 1933-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-11-30 | 1937-06-01 | 1937-12-01 | $7700.00 | Window Closed / Lapsed |