Patent US1540987A successfully refreshed from Google Patents.
US1540987A
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US
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Abrasive
Assignee: HEINTZ LAB Inc
•
Filing: 1924-02-28
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Granted: 1925-06-09
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Expires: 1944-02-28
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Heintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:24
CPC Classifications
B; B23; B23P; B23P17/00; B23P17/04; B23P17/06; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T29/00; Y10T29/14; Y10T29/147; Y10T428/00; Y10T428/12; Y10T428/12354; Y10T428/1241; Y10T428/12444
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) | 1928-06-08 | 1928-12-08 | 1929-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-06-08 | 1932-12-08 | 1933-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-06-08 | 1936-12-08 | 1937-06-09 | $7700.00 | Window Closed / Lapsed |