US2822764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening unit for insulating roofs
Assignee: Individual
•
Filing: 1954-01-26
•
Granted: 1958-02-11
•
Expires: 1974-01-26
Abstract
No abstract record available.
Inventors
- 👤 George D Widman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:42
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/16; E04D13/1606; E04D13/1643; E04D13/165; E04D3/00; E04D3/36; E04D3/3605; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49938; Y10T29/49943
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1548061A
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US1612075A
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US1835243A
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US2060093A
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US2250160A
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US2451286A
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US2672107A
Cited
US2665780A
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US2717562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |