Patent US2781083A successfully refreshed from Google Patents.
US2781083A
Expired / Lapsed
US
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Spring structure
Assignee: Individual
•
Filing: 1952-07-22
•
Granted: 1957-02-12
•
Expires: 1972-07-22
Abstract
No abstract record available.
Inventors
- 👤 Agrillo Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:04
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/045; A47C27/0456; A47C7/00; A47C7/02; A47C7/34; A47C7/347
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US882654A
Cited
GB134986A
Cited
US1982030A
Cited
US1963055A
Cited
US2129251A
Cited
US2230109A
Cited
US2273064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |