US3521859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1968-05-31
•
Granted: 1970-07-28
•
Expires: 1988-05-31
Abstract
No abstract record available.
Inventors
- 👤 Erich W Gronemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44; B65D83/48; F; F16; F16K; F16K31/00; F16K31/44; F16K31/58; B65D83/16; B65D83/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2883090A
Cited
US3145011A
Cited
US3248015A
Cited
US3203665A
Cited
US3333744A
Cited
US3348743A
Cited
US3434695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |