Patent US1021374A successfully refreshed from Google Patents.
US1021374A
Expired / Lapsed
US
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Sprinkler-head.
Assignee: Individual
•
Filing: 1911-12-02
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Granted: 1912-03-26
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Expires: 1931-12-02
Abstract
No abstract record available.
Inventors
- 👤 Frank E Opitz
- 👤 Robert R Egbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:28
CPC Classifications
B; B05; B05B; B05B15/00; B05B15/60; B05B15/62; B05B15/625; B05B1/00; B05B1/02; B05B1/04; B05B1/046
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) | 1915-03-26 | 1915-09-25 | 1916-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-03-26 | 1919-09-25 | 1920-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-03-26 | 1923-09-25 | 1924-03-26 | $7700.00 | Window Closed / Lapsed |