Patent DE136719C successfully refreshed from Google Patents.
US2991544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright surfaced metal sheets and method of producing same
Assignee: Primerica Inc
•
Filing: 1957-05-07
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Granted: 1961-07-11
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Expires: 1977-05-07
Abstract
No abstract record available.
Inventors
- 👤 Lenard P Gotsch
- 👤 Paul W Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:42
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/02; C21D8/0278; B; B21; B21B; B21B1/00; B21B1/22; B21B1/227; B21B2261/00; B21B2261/14; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/927; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2305793A
Cited
US2306792A
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US2443170A
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US2441476A
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US2474015A
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US2715830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |