Patent US3516781A successfully refreshed from Google Patents.
US3516781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel modifying process
Assignee: JP Stevens and Co Inc
•
Filing: 1967-02-13
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Granted: 1970-06-23
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Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Ildo E Pensa
- 👤 Armand L Greenhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:51
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/21; D06M15/263; D06M15/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3220869A
Cited
US3169122A
Cited
US3162618A
Cited
US3165375A
Cited
US3317630A
Cited
US3225013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |