US3513491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Athlete's landing pit with foam-block cushion units
Assignee: Individual
•
Filing: 1968-03-13
•
Granted: 1970-05-26
•
Expires: 1988-03-13
Abstract
No abstract record available.
Inventors
- 👤 Donald W Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:03
CPC Classifications
A; A47; A47C; A47C31/00; A47C31/005; A47C27/00; A63; A63B; A63B6/00; A63B6/02; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/285; C08G18/2875; C08G18/288; C08G18/2885; C08G18/30; C08G18/38; C08G18/3802; C08G18/3814; C08G18/40; C08G18/48; C08G18/4833; C08G18/4837; C08G18/4841; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/48; F; F16; F16K; F16K31/00; F16K31/44; F16K35/00; F16K35/02; C08G2110/00; C08G2110/0041; C08G2110/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2029370A
Cited
US2216991A
Cited
US2547840A
Cited
US2862214A
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US3204259A
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US3369808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |