US2969720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pouring bridge for concrete work
Assignee: Individual
•
Filing: 1957-07-09
•
Granted: 1961-01-31
•
Expires: 1977-07-09
Abstract
No abstract record available.
Inventors
- 👤 Troy T Burnahm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
E; E01; E01D; E01D21/00; E01C; E01C19/00; E01C19/12; E01C19/18; E01C19/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US345652A
Cited
US1609407A
Cited
US1985220A
Cited
US2251095A
Cited
US2818790A
Cited
US2851311A
Cited
US2872283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |