Patent US3100778A successfully refreshed from Google Patents.
US3100778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 1,3,3 trimethyl-spiro (2'h-1'-benzopyran-2,2'-indolene)
Assignee: NCR Voyix Corp
•
Filing: 1961-05-09
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Granted: 1963-08-13
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Expires: 1981-05-09
Abstract
No abstract record available.
Inventors
- 👤 Berman Elliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/685; C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6561
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2953454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |