US3320067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process utilizing photospirans
Assignee: Polaroid Corp
•
Filing: 1963-09-03
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Granted: 1967-05-16
•
Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Lloyd D Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/10; C07D513/00; C07D513/02; C07D513/10; C08; C08K; C08K5/00; C08K5/0008; G; G03; G03C; G03C1/00; G03C1/685; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A COMPOSITION OF MATTER CAPABLE OF UNDERGOING A REVERSIBLE COLOR CHANGE WHEN EXPOSED TO RADIANT ENERGY, COMPRISING A POLYMERIC FILM HAVING DISPERSED THEREIN A WATER-SOLUBLE PHOTOSPIRAN OF THE FORMULA:
Claim 2
Dependent Claim
29 words
A COMPOSITION OF MATTER CAPABLE OF UNDERGOING A REVERSIBLE COLOR CHANGE WHEN EXPOSED TO RADIANT ENERGY, COMPRISING A POLYMERIC FILM HAVING DISPERSED THEREIN A WATER-SOLUBLE PHOTOSPIRAN OF THE FORMULA:
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |