US903019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementitious material.
Assignee: HENRY S SPACKMAN ENGINEERING Co
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Filing: 1908-09-22
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Granted: 1908-11-03
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Expires: 1928-09-22
Abstract
No abstract record available.
Inventors
- 👤 Henry S Spackman
- 👤 Ellis W Lazell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B28/065
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) | 1911-11-03 | 1912-05-04 | 1912-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-11-03 | 1916-05-04 | 1916-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-11-03 | 1920-05-04 | 1920-11-03 | $7700.00 | Window Closed / Lapsed |