Patent US2777660A successfully refreshed from Google Patents.
US2777660A
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Assignee: Individual
•
Filing: 1953-11-27
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Granted: 1957-01-15
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Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Henry P Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:22
CPC Classifications
E; E04; E04G; E04G25/00; E04G25/04; E04G25/06; E04G25/061; E04G25/063; E04G25/068; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH71669A
Cited
CH162066A
Cited
CH161258A
Cited
GB500085A
Cited
US2468484A
Cited
US2532168A
Cited
FR1021928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |