US2612962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor construction
Assignee: PENINSULAR METAL PRODUCTS Corp
•
Filing: 1947-09-09
•
Granted: 1952-10-07
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Paul M Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:46
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR563529A
Cited
US1622138A
Cited
FR637938A
Cited
US1783011A
Cited
US1844786A
Cited
US1987650A
Cited
US1892036A
Cited
US1891272A
Cited
US1951817A
Cited
US2030953A
Cited
GB449664A
Cited
US2146367A
Cited
GB525809A
Cited
US2330842A
Cited
US2321572A
Cited
US2284902A
Cited
GB580008A
Cited
US2405488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |