US2670763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for fastening sheets of insulation on ducts
Assignee: Individual
•
Filing: 1949-06-21
•
Granted: 1954-03-02
•
Expires: 1969-06-21
Abstract
No abstract record available.
Inventors
- 👤 James L Hiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:00
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/0263; F16; F16L; F16L59/00; F16L59/12; F16L59/14; F16L9/00; F16L9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US195866A
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US218340A
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US344691A
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US443710A
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US524878A
Cited
US926423A
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US1239106A
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US1782774A
Cited
US2110734A
Cited
US2338801A
Cited
US2396826A
Cited
GB572493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |