US2754508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sector p. p. i. expansion
Assignee: Individual
•
Filing: 1946-01-29
•
Granted: 1956-07-10
•
Expires: 1966-01-29
Abstract
No abstract record available.
Inventors
- 👤 Albert D Ehrenfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:22
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/10; G01S7/12; G01S7/14; G01S7/40; G01S7/4004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2408414A
Cited
US2440250A
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US2406970A
Cited
US2412669A
Cited
US2355363A
Cited
US2421747A
Cited
US2477651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |