US3421270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated roof
Assignee: JOHN W CHANEY
•
Filing: 1967-03-10
•
Granted: 1969-01-14
•
Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 John W Chaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:40
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/02; E04B7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US457418A
Cited
US1629150A
Cited
US799544A
Cited
US1103773A
Cited
US1532695A
Cited
US2047721A
Cited
US2187087A
Cited
US2214886A
Cited
US2245133A
Cited
US3236014A
Cited
US3308583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |