US2978770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-tight fastener and closure
Assignee: Arthur D Little Inc
•
Filing: 1958-12-09
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Granted: 1961-04-11
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Expires: 1978-12-09
Abstract
No abstract record available.
Inventors
- 👤 Charles R Sperry
- 👤 Carleton S Marden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/32; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/31; Y10S24/37; Y10T; Y10T24/00; Y10T24/25; Y10T24/2591; Y10T24/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |