US2991533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Form for concrete columns
Assignee: Sonoco Products Co
•
Filing: 1958-04-21
•
Granted: 1961-07-11
•
Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Edward S Reid
- 👤 Arthur E Davis
- 👤 William E Gray
- 👤 Herbert M Byrd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
E; E04; E04G; E04G13/00; E04G13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1295310A
Cited
US1756542A
Cited
US1734773A
Cited
US2050258A
Cited
US2677165A
Cited
US2873503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |