Patent US3436802A successfully refreshed from Google Patents.
US3436802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder metallurgy
Assignee: Spang and Co
•
Filing: 1967-11-14
•
Granted: 1969-04-08
•
Expires: 1987-11-14
Abstract
No abstract record available.
Inventors
- 👤 Philip Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:12
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0433; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14708; H01F1/14733; H01F1/14741
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB345736A
Cited
US2776887A
Cited
US2793116A
Cited
US2806786A
Cited
GB789048A
Cited
US2928733A
Cited
US3081529A
Cited
US3144330A
Cited
US3293006A
Cited
US3216824A
Cited
US3268368A
Cited
US3326677A
Cited
US3326676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |