US2921208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holdback
Assignee: Individual
•
Filing: 1956-07-20
•
Granted: 1960-01-12
•
Expires: 1976-07-20
Abstract
No abstract record available.
Inventors
- 👤 Wayne J Morrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:00
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR407088A
Cited
US2114887A
Cited
US2149569A
Cited
US2485628A
Cited
US2615944A
Cited
US2701317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |