Patent US2821764A successfully refreshed from Google Patents.
US2821764A
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Plastic grommets and a method for forming them
Assignee: United Shoe Machinery Corp
•
Filing: 1954-03-11
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Granted: 1958-02-04
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Expires: 1974-03-11
Abstract
No abstract record available.
Inventors
- 👤 James F Leahy
- 👤 Charles B Noonan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/32; B; B29; B29C; B29C45/00; B29C45/14; B29C45/1418; B29C45/14311; B29C45/14336; B29C45/14344; B29C2045/14327; Y; Y10; Y10T; Y10T24/00; Y10T24/37; Y10T24/3742
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |