US2620542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete form
Assignee: FLEXIFORM CONSTRUCTION Co
•
Filing: 1949-10-17
•
Granted: 1952-12-09
•
Expires: 1969-10-17
Abstract
No abstract record available.
Inventors
- 👤 Fontaine Lamar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:28
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/065; E04G17/0655; E04G17/0657; E04G11/00; E04G11/06; E04G11/08; E04G11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1626897A
Cited
US2164592A
Cited
US2222339A
Cited
US2401263A
Cited
US2270448A
Cited
US2358975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |