US2900992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal processing apparatus
Assignee: Ajem Laboratories Inc
•
Filing: 1956-03-14
•
Granted: 1959-08-25
•
Expires: 1976-03-14
Abstract
No abstract record available.
Inventors
- 👤 Willard L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:52
CPC Classifications
C; C23; C23G; C23G3/00; C23G3/02; C23G3/023; C25; C25D; C25D11/00; C25D11/005; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5198
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US141837A
Cited
US1791101A
Cited
US1998192A
Cited
DE696160C
Cited
US2234153A
Cited
US2359088A
Cited
US2673761A
Cited
US2529762A
Cited
US2578804A
Cited
US2565855A
Cited
US2622428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |