US2997766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: IRVING CONSTANT
•
Filing: 1959-01-08
•
Granted: 1961-08-29
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Expires: 1979-01-08
Abstract
No abstract record available.
Inventors
- 👤 Ambrose J Mcnamara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/36; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2539; Y10T24/2591
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB678857A
Cited
DE570050C
Cited
US1923262A
Cited
FR867540A
Cited
US2573059A
Cited
US2658251A
Cited
US2738560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |