US2543939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding building slabs in position
Assignee: Individual
•
Filing: 1947-04-11
•
Granted: 1951-03-06
•
Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
- 👤 Rumble Roy William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:54
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/16; E04B5/32; E04B5/36; E04B1/00; E04B1/16; E04B1/164; E04B7/00; E04B7/02
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |