Patent CA703377A successfully refreshed from Google Patents.
Patent US3429476A successfully refreshed from Google Patents.
US3429476A
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Assignee: General Descaling Co Ltd
•
Filing: 1966-01-26
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Granted: 1969-02-25
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Expires: 1986-01-26
Abstract
No abstract record available.
Inventors
- 👤 Keith Ellis Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:30
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/136; B; B65; B65D; B65D53/00; B65D53/02; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205; Y10T292/212; Y10T292/214; Y10T292/216; Y10T292/218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL23619C
Cited
US2093787A
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US2140456A
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US2075381A
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US2281145A
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US2352192A
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US2639144A
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US2703188A
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US2743034A
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US2757820A
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GB777733A
Cited
US2810401A
Cited
US2852295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |