US3328854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grommet reinforcement for canvas material
Assignee: Hettrick Manufacturing Co
•
Filing: 1965-04-26
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Granted: 1967-07-04
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Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Aldo L Tombari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:30
CPC Classifications
A; A44; A44B; A44B13/00; A44B13/0058; A44B13/0076; A44B13/0082; Y; Y10; Y10T; Y10T24/00; Y10T24/37; Y10T24/3742; Y10T24/3745
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |