Patent US2219723A successfully refreshed from Google Patents.
US2219723A
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US
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Assignee: MASTIC ASPHALT Corp
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Filing: 1939-05-01
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Granted: 1940-10-29
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Expires: 1959-05-01
Abstract
No abstract record available.
Inventors
- 👤 Henry A Mulderink
- 👤 Drinkall Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:48
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/02; E04F19/022; E04F19/024; F; F16; F16B; F16B2200/00; F16B2200/67
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) | 1943-10-29 | 1944-04-29 | 1944-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-29 | 1948-04-29 | 1948-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-29 | 1952-04-29 | 1952-10-29 | $7700.00 | Window Closed / Lapsed |