US3477732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spacer-expander
Assignee: SPX Technologies Inc
•
Filing: 1965-04-14
•
Granted: 1969-11-11
•
Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Frank G Warrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:08
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/145; F16J9/06; F16J9/064; F16J9/066; F16J9/069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2394408A
Cited
US2722467A
Cited
US2833605A
Cited
US2817565A
Cited
US2837385A
Cited
US3081100A
Cited
US3181875A
Cited
US3190662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |