Patent US2777532A successfully refreshed from Google Patents.
US2777532A
Expired / Lapsed
US
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Surface drains
Assignee: Individual
•
Filing: 1953-05-22
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Granted: 1957-01-15
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Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 Martin A Sisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
B; B63; B63B; B63B13/00; B63B13/02; E; E03; E03F; E03F5/00; E03F5/04; E03F5/0407; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0409; E03F2005/0412; E03F2005/0413; E04D2013/0413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |