US2928271A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1957-04-29
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Granted: 1960-03-15
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Expires: 1977-04-29
Abstract
No abstract record available.
Inventors
- 👤 Robert G Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:41
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/16; E05B37/166; E05B67/00; E05B67/06; E05B67/22; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/417; Y10T70/422; Y10T70/424; Y10T70/70; Y10T70/7153; Y10T70/7158; Y10T70/7164; Y10T70/7181; Y10T70/7198; Y10T70/7237; Y10T70/726; Y10T70/7271; Y10T70/7316
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |