US2929409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced tubular support members
Assignee: McGraw Edison Co
•
Filing: 1957-03-21
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Granted: 1960-03-22
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Albert R Waehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:20
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/10; B21C37/15; Y; Y10; Y10S; Y10S273/00; Y10S273/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |