US2904870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete wall form
Assignee: Superior Concrete Accessories Inc
•
Filing: 1955-04-08
•
Granted: 1959-09-22
•
Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Hillberg Bror
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:49
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/07; E04G17/0707; E04G17/0721; Y; Y10; Y10S; Y10S425/00; Y10S425/129
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US775685A
Cited
US1032419A
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US1013632A
Cited
US1621563A
Cited
DE528401C
Cited
US2236616A
Cited
US2442292A
Cited
FR1024441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |