US3451357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable shock-absorbing bulkheads
Assignee: St. Paul Foundry & Manufacturing Co
•
Filing: 1966-06-13
•
Granted: 1969-06-24
•
Expires: 1986-06-13
Abstract
No abstract record available.
Inventors
- 👤 Benjamin R Barnard
- 👤 Gustav Maass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
B; B61; B61K; B61K7/00; B61K7/16; B61K7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304023A
Cited
US1745982A
Cited
US2826156A
Cited
US2982230A
Cited
US2978993A
Cited
US3089437A
Cited
US3200772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |