Patent US3027749A successfully refreshed from Google Patents.
Patent US2732744A successfully refreshed from Google Patents.
US2732744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
kuchman etal
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:27
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/06; B21D7/063; B21D11/00; B21D11/20; B21D11/203; B21F; B21F1/00; B21F1/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US808672A
Cited
US826153A
Cited
US1676907A
Cited
US1929600A
Cited
US2029974A
Cited
US2122104A
Cited
US2554350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |