US3448647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for producing constant volume gaskets
Assignee: National Coupling Co Inc
•
Filing: 1965-09-13
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Granted: 1969-06-10
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Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Marion R Miller
- 👤 Lowell D Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:56
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0053; B29C; B29C67/00; B29C67/0003; B29L; B29L2031/00; B29L2031/26; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T83/00; Y10T83/444; Y10T83/4455; Y10T83/525; Y10T83/54; Y10T83/647; Y10T83/658
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |