US1821234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple conduit
Assignee: Brown Co
•
Filing: 1927-10-29
•
Granted: 1931-09-01
•
Expires: 1947-10-29
Abstract
No abstract record available.
Inventors
- 👤 Parker Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:27
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/04; H02G3/0462; H02G3/0481
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) | 1934-08-31 | 1935-03-02 | 1935-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-31 | 1939-03-02 | 1939-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-31 | 1943-03-02 | 1943-09-01 | $7700.00 | Window Closed / Lapsed |