Patent US2879946A successfully refreshed from Google Patents.
US2879946A
Expired / Lapsed
US
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Self-projectable and retractable sprinkler heads
Assignee: Individual
•
Filing: 1957-01-09
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Granted: 1959-03-31
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Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Charles J Stipek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:23
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/30; B05B1/32; B05B1/323; B05B1/26; B05B1/262; B05B1/265; B05B15/00; B05B15/70; B05B15/72; B05B15/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1492941A
Cited
US1801524A
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US1847921A
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US2125863A
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US2619378A
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US2796293A
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US2812977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |