US3429172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making gear forging apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1965-10-05
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Granted: 1969-02-25
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Expires: 1985-10-05
Abstract
No abstract record available.
Inventors
- 👤 Kurt F Lierse
- 👤 James A Timura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/28; B21K1/30; B21K1/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1285104A
Cited
US2609777A
Cited
US2901995A
Cited
US2939349A
Cited
US3079823A
Cited
US3157111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |