US1333004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of insulating and protecting transformers or other electrical apparatus
Assignee: Individual
•
Filing: 1917-08-13
•
Granted: 1920-03-09
•
Expires: 1937-08-13
Abstract
No abstract record available.
Inventors
- 👤 Francis A Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:33
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022
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) | 1923-03-09 | 1923-09-08 | 1924-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-09 | 1927-09-08 | 1928-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-09 | 1931-09-08 | 1932-03-09 | $7700.00 | Window Closed / Lapsed |