Patent US1972810A successfully refreshed from Google Patents.
US1972810A
Expired / Lapsed
US
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Asphalt prepared building material and method of making same
Assignee: Patent and Licensing Corp
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Filing: 1931-12-02
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Granted: 1934-09-04
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Expires: 1951-12-02
Abstract
No abstract record available.
Inventors
- 👤 Jules L Wettlaufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:56
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/14; E04F13/147; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24579; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 0
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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) | 1937-09-03 | 1938-03-05 | 1938-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-09-03 | 1942-03-05 | 1942-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-09-03 | 1946-03-05 | 1946-09-04 | $7700.00 | Window Closed / Lapsed |