US3499631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corral construction
Assignee: Individual
•
Filing: 1968-11-29
•
Granted: 1970-03-10
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 Russell C Heldenbrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:30
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/14; E04H17/1413; E04H17/1447; E04H17/1452
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US54794A
Cited
US199211A
Cited
US1228717A
Cited
US1506502A
Cited
GB679297A
Cited
US2775473A
Cited
GB907632A
Cited
US3136530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |