Patent US1609937A successfully refreshed from Google Patents.
US1609937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated reenforcing structure for waterproofing systems
Assignee: BARBER ASPHALT Co
•
Filing: 1922-02-25
•
Granted: 1926-12-07
•
Expires: 1942-02-25
Abstract
No abstract record available.
Inventors
- 👤 Charles N Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
D; D06; D06B; D06B3/00; D06B3/10; D06B2700/00; D06B2700/27; Y; Y10; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/172; Y10T442/20; Y10T442/2221; Y10T442/2254
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) | 1929-12-06 | 1930-06-07 | 1930-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-12-06 | 1934-06-07 | 1934-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-12-06 | 1938-06-07 | 1938-12-07 | $7700.00 | Window Closed / Lapsed |