US2202820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator
Assignee: Owens Corning
•
Filing: 1935-11-20
•
Granted: 1940-06-04
•
Expires: 1955-11-20
Abstract
No abstract record available.
Inventors
- 👤 Fred J Baird
- 👤 Allen L Simison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:46
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/006; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; C; C04; C04B; C04B26/00; C04B26/02; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/084; H01R; H01R39/00; H01R39/02; H01R39/04; C04B2111/00; C04B2111/90; C04B2111/92
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) | 1943-06-04 | 1943-12-04 | 1944-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-04 | 1947-12-04 | 1948-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-04 | 1951-12-04 | 1952-06-04 | $7700.00 | Window Closed / Lapsed |