Patent US3372772A successfully refreshed from Google Patents.
US3372772A
Expired / Lapsed
US
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Assignee: Individual
•
Filing: 1966-05-09
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Granted: 1968-03-12
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Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 Singer Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:33
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E06; E06C; E06C7/00; E06C7/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL15061C
Cited
US463868A
Cited
US2069969A
Cited
US2183191A
Cited
US2174891A
Cited
US2876047A
Cited
US3225863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |