Patent US2405843A successfully refreshed from Google Patents.
US1597760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-relay-circuit controller
Assignee: Individual
•
Filing: 1925-03-25
•
Granted: 1926-08-31
•
Expires: 1945-03-25
Abstract
No abstract record available.
Inventors
- 👤 Burstyn Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/02; H04L27/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
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) | 1929-08-30 | 1930-03-01 | 1930-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-08-30 | 1934-03-01 | 1934-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-08-30 | 1938-03-01 | 1938-08-31 | $7700.00 | Window Closed / Lapsed |