US3060931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm and method of making
Assignee: Individual
•
Filing: 1960-05-13
•
Granted: 1962-10-30
•
Expires: 1980-05-13
Abstract
No abstract record available.
Inventors
- 👤 John T Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:40
CPC Classifications
B; B29; B29D; B29D22/00; B29D22/02; A; A61; A61F; A61F6/00; A61F6/06; A61F6/08; B29K; B29K2021/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US563387A
Cited
US580336A
Cited
US2024539A
Cited
US2111313A
Cited
US2252758A
Cited
US2321340A
Cited
US2697057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |