US3245187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof structure
Assignee: Individual
•
Filing: 1963-09-20
•
Granted: 1966-04-12
•
Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 May David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/36; E04D3/361; E04D3/362
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE189198C
Cited
US154297A
Cited
US186021A
Cited
US302113A
Cited
US422319A
Cited
US618516A
Cited
GB190918541A
Cited
US1076065A
Cited
US1210855A
Cited
US1179523A
Cited
US2163381A
Cited
US2308442A
Cited
GB565883A
Cited
US2378567A
Cited
US3114218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |