US2821055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening of flexible bags in closed condition
Assignee: Individual
•
Filing: 1955-02-28
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Granted: 1958-01-28
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Leland H Platt
- 👤 Jr Leland H Platt
- 👤 John D Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:14
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/04; B65B51/06; B65B51/065
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |