US3496257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure forming machine
Assignee: Brown Machine Company of Michigan Inc
•
Filing: 1967-06-27
•
Granted: 1970-02-17
•
Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Gaylord W Brown
- 👤 Donald J Rise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/38; B29C51/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2926385A
Cited
US2891280A
Cited
US2917092A
Cited
US2940126A
Cited
US3225461A
Cited
US3329748A
Cited
US3291874A
Cited
US3304352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |