Patent US2718898A successfully refreshed from Google Patents.
US2718898A
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Assignee: Walworth Co
•
Filing: 1951-01-02
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Granted: 1955-09-27
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Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Cotton Arthur Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:31
CPC Classifications
F; F16; F16K; F16K39/00; F16K39/02; F16K39/024; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6552; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86968; Y10T137/86976; Y10T137/877; Y10T137/87708; Y10T137/8774; Y10T137/87748
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624511A
Cited
US640577A
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US1031294A
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US938491A
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US951318A
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US1229726A
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US1797054A
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US1824902A
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US2484199A
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US2471160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |