US3376129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of a highdispersion carbonyl iron
Assignee: ANNA ERNESTOVNA FRIDENBERG
•
Filing: 1964-11-25
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Granted: 1968-04-02
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Expires: 1984-11-25
Abstract
No abstract record available.
Inventors
- 👤 Syrkin Vitaly Grigorjevich
- 👤 Tolmassky Iosif Semenovich
- 👤 Fridenberg Serafima Ernestovna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:48
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/30; B22F9/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2772956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |