US3146497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure
Assignee: Individual
•
Filing: 1959-11-16
•
Granted: 1964-09-01
•
Expires: 1979-11-16
Abstract
No abstract record available.
Inventors
- 👤 Donald H Short
- 👤 Robert J Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:23
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |