Patent US3394520A successfully refreshed from Google Patents.
US3394520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking roofing shingle
Assignee: ARTHUR W SKELTON JR
•
Filing: 1966-04-14
•
Granted: 1968-07-30
•
Expires: 1986-04-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur W Skelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:36
CPC Classifications
E; E04; E04D; E04D1/00; E04D1/26; E04D1/265; E04D1/29; E04D1/2907; E04D1/2914; E04D1/2918; E04D3/00; E04D3/24; E04D3/32; E04D3/36; E04D3/361; E04D3/362; E04D1/2942; E04D2001/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |