US1944869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for making commutators
Assignee: Individual
•
Filing: 1928-11-19
•
Granted: 1934-01-30
•
Expires: 1948-11-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Apple
- 👤 Edward M Apple
- 👤 Darroch Gourley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/04; H02K13/08
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) | 1937-01-29 | 1937-07-31 | 1938-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-29 | 1941-07-31 | 1942-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-29 | 1945-07-31 | 1946-01-30 | $7700.00 | Window Closed / Lapsed |