Patent US2831688A successfully refreshed from Google Patents.
US2831688A
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US
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Diving board
Assignee: Individual
•
Filing: 1954-10-14
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Granted: 1958-04-22
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Expires: 1974-10-14
Abstract
No abstract record available.
Inventors
- 👤 Ervin H Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:01
CPC Classifications
A; A63; A63B; A63B5/00; A63B5/08; A63B5/10; A63B2208/00; A63B2208/12; Y; Y10; Y10S; Y10S273/00; Y10S273/07; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/24; Y10T428/24174
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB450524A
Cited
US2271961A
Cited
US2593714A
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US2519036A
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US2578781A
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US2594459A
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US2541497A
Cited
US2643700A
Cited
US2756524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |