US3529904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm seal structure
Assignee: Westinghouse Electric Corp
•
Filing: 1968-10-28
•
Granted: 1970-09-22
•
Expires: 1988-10-28
Abstract
No abstract record available.
Inventors
- 👤 Augustine J Scalzo
- 👤 James H Borden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:26
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F01D11/025; F01D11/001; F16; F16J; F16J15/00; F16J15/44; F16J15/441; F05; F05B; F05B2230/00; F05B2230/60; F05B2230/604; F05B2230/606; F05D; F05D2230/00; F05D2230/60; F05D2230/64; F05D2230/642
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1273634A
Cited
US1298524A
Cited
GB124129A
Cited
US1855890A
Cited
US2229963A
Cited
US2614870A
Cited
GB643604A
Cited
US3230710A
Cited
US3408048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |