Patent US2732806A successfully refreshed from Google Patents.
US2732806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
felez alvarez etal
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:50
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/04; H; H02; H02K; H02K33/00; H02K33/02; H02K33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US11300A
Cited
US1888322A
Cited
GB440693A
Cited
US2143391A
Cited
US2179925A
Cited
GB527183A
Cited
US2253206A
Cited
US2416843A
Cited
US2471796A
Cited
US2488723A
Cited
US2488995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |