US2821376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring balances
Assignee: George Salter and Co Ltd
•
Filing: 1954-04-19
•
Granted: 1958-01-28
•
Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Aston Horace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:57
CPC Classifications
G; G01; G01G; G01G3/00; G01G3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66524A
Cited
US371920A
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US642321A
Cited
CH99316A
Cited
DE604663C
Cited
FR786861A
Cited
US2175024A
Cited
US2683985A
Cited
US2613927A
Cited
US2681222A
Cited
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 |