Patent US1975487A successfully refreshed from Google Patents.
US1975487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making strip shingles
Assignee: ASPHALT PROCESS Corp
•
Filing: 1933-02-01
•
Granted: 1934-10-02
•
Expires: 1953-02-01
Abstract
No abstract record available.
Inventors
- 👤 John A Topping
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:29
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/143; B26D1/15; B26D1/151; E; E04; E04D; E04D1/00; E04D1/26; E04D2001/005; Y; Y10; Y10S; Y10S83/00; Y10S83/92; Y10T; Y10T83/00; Y10T83/04; Y10T83/0515; Y10T83/0524; Y10T83/0538; Y10T83/0567
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-10-01 | 1938-04-02 | 1938-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-01 | 1942-04-02 | 1942-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-01 | 1946-04-02 | 1946-10-02 | $7700.00 | Window Closed / Lapsed |