US2931256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bar turner
Assignee: Birdsboro Corp
•
Filing: 1956-09-04
•
Granted: 1960-04-05
•
Expires: 1976-09-04
Abstract
No abstract record available.
Inventors
- 👤 Edward C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:52
CPC Classifications
B; B21; B21B; B21B39/00; B21B39/20; B21B39/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US379974A
Cited
US449511A
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US485982A
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US774228A
Cited
US1746488A
Cited
US1977214A
Cited
US1915714A
Cited
US2124677A
Cited
US2666534A
Cited
US2632346A
Cited
GB696115A
Cited
US2664215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |