US2429293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making rollers
Assignee: PARSONS ENGINEERING Corp
•
Filing: 1943-06-30
•
Granted: 1947-10-21
•
Expires: 1963-06-30
Abstract
No abstract record available.
Inventors
- 👤 Cecil C Peck
- 👤 Nelson E Burdiek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49547; Y10T29/49556; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49934; Y10T403/00; Y10T403/49; Y10T403/4974; Y10T403/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US243897A
Cited
US1092464A
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US1200076A
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US1454305A
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US1618554A
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US1648626A
Cited
US2046503A
Cited
US2046504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |