US2719475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ventilated roof
Assignee: Individual
•
Filing: 1951-11-19
•
Granted: 1955-10-04
•
Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Horace H Royall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/24; B60H1/26; B60H1/262; B60Q; B60Q3/00; B60Q3/40; B60Q3/41; B60Q3/43; B60Q2500/00; B60Q2500/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US36536A
Cited
US1303410A
Cited
US1778591A
Cited
DE616300C
Cited
US2089060A
Cited
US2145222A
Cited
US2207958A
Cited
US2251663A
Cited
US2628550A
Cited
US2576354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |