US2721353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concealed hinge
Assignee: Individual
•
Filing: 1952-03-17
•
Granted: 1955-10-25
•
Expires: 1972-03-17
Abstract
No abstract record available.
Inventors
- 👤 Mackintosh Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:56
CPC Classifications
E; E05; E05D; E05D3/00; E05D3/06; E05D3/16; E05D2003/166; E05Y; E05Y2600/00; E05Y2600/40; E05Y2600/41; E05Y2600/412
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US414461A
Cited
US465707A
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US373611A
Cited
US818435A
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US879067A
Cited
US1011512A
Cited
US1030936A
Cited
US1211366A
Cited
US2021702A
Cited
FR828436A
Cited
US2189048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |